Finding the Fourth Proportional to 607,068.10, 851,139.50 and 607,068.10

Step by Step Solution

1. Step 1: Write the proportion equation
   607,068.10 : 851,139.50 = 607,068.10 : x
2. Step 2: Convert to fraction form
   607,068.10/851,139.50 = 607,068.10/x
3. Step 3: Cross multiply
   607,068.10x = 851,139.50 × 607,068.10
4. Step 4: Simplify right side
   607,068.10x = 516,699,639,099.95
5. Step 5: Solve for x
   x = 516,699,639,099.95/607,068.10
6. Step 6: Final answer
   x = 851,139.50