Finding the Fourth Proportional to 2,211,290.72, 3,316,954.54 and 613,978.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,211,290.72 : 3,316,954.54 = 613,978.37 : x
2. Step 2: Convert to fraction form
   2,211,290.72/3,316,954.54 = 613,978.37/x
3. Step 3: Cross multiply
   2,211,290.72x = 3,316,954.54 × 613,978.37
4. Step 4: Simplify right side
   2,211,290.72x = 2,036,538,341,833.30
5. Step 5: Solve for x
   x = 2,036,538,341,833.30/2,211,290.72
6. Step 6: Final answer
   x = 920,972.68