Finding the Fourth Proportional to 662,111.55, 913,650.78 and 371,656.59

Step by Step Solution

1. Step 1: Write the proportion equation
   662,111.55 : 913,650.78 = 371,656.59 : x
2. Step 2: Convert to fraction form
   662,111.55/913,650.78 = 371,656.59/x
3. Step 3: Cross multiply
   662,111.55x = 913,650.78 × 371,656.59
4. Step 4: Simplify right side
   662,111.55x = 339,564,333,345.64
5. Step 5: Solve for x
   x = 339,564,333,345.64/662,111.55
6. Step 6: Final answer
   x = 512,850.64