Finding the Fourth Proportional to 936,328.10, 1,402,116.15 and 515,128.10

Step by Step Solution

1. Step 1: Write the proportion equation
   936,328.10 : 1,402,116.15 = 515,128.10 : x
2. Step 2: Convert to fraction form
   936,328.10/1,402,116.15 = 515,128.10/x
3. Step 3: Cross multiply
   936,328.10x = 1,402,116.15 × 515,128.10
4. Step 4: Simplify right side
   936,328.10x = 722,269,428,328.82
5. Step 5: Solve for x
   x = 722,269,428,328.82/936,328.10
6. Step 6: Final answer
   x = 771,384.98