Finding the Fourth Proportional to 870,046.71, 1,200,395.42 and 507,213.69

Step by Step Solution

1. Step 1: Write the proportion equation
   870,046.71 : 1,200,395.42 = 507,213.69 : x
2. Step 2: Convert to fraction form
   870,046.71/1,200,395.42 = 507,213.69/x
3. Step 3: Cross multiply
   870,046.71x = 1,200,395.42 × 507,213.69
4. Step 4: Simplify right side
   870,046.71x = 608,856,987,901.23
5. Step 5: Solve for x
   x = 608,856,987,901.23/870,046.71
6. Step 6: Final answer
   x = 699,798.05