Finding the Fourth Proportional to 1,414,315.76, 2,120,815.92 and 515,131.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,414,315.76 : 2,120,815.92 = 515,131.52 : x
2. Step 2: Convert to fraction form
   1,414,315.76/2,120,815.92 = 515,131.52/x
3. Step 3: Cross multiply
   1,414,315.76x = 2,120,815.92 × 515,131.52
4. Step 4: Simplify right side
   1,414,315.76x = 1,092,499,128,509.80
5. Step 5: Solve for x
   x = 1,092,499,128,509.80/1,414,315.76
6. Step 6: Final answer
   x = 772,457.72