Finding the Fourth Proportional to 1,091,536,156.69, 1,506,319,896.22 and 621,681,196.97

Step by Step Solution

1. Step 1: Write the proportion equation
   1,091,536,156.69 : 1,506,319,896.22 = 621,681,196.97 : x
2. Step 2: Convert to fraction form
   1,091,536,156.69/1,506,319,896.22 = 621,681,196.97/x
3. Step 3: Cross multiply
   1,091,536,156.69x = 1,506,319,896.22 × 621,681,196.97
4. Step 4: Simplify right side
   1,091,536,156.69x = 936,450,756,103,987,328
5. Step 5: Solve for x
   x = 936,450,756,103,987,328/1,091,536,156.69
6. Step 6: Final answer
   x = 857,920,051.82