Finding the Fourth Proportional to 2,147,128.56, 3,220,706.61 and 630,805.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,147,128.56 : 3,220,706.61 = 630,805.32 : x
2. Step 2: Convert to fraction form
   2,147,128.56/3,220,706.61 = 630,805.32/x
3. Step 3: Cross multiply
   2,147,128.56x = 3,220,706.61 × 630,805.32
4. Step 4: Simplify right side
   2,147,128.56x = 2,031,638,863,747.17
5. Step 5: Solve for x
   x = 2,031,638,863,747.17/2,147,128.56
6. Step 6: Final answer
   x = 946,212.03