Finding the Fourth Proportional to 616,139.85, 849,061.68 and 471,109.86

Step by Step Solution

1. Step 1: Write the proportion equation
   616,139.85 : 849,061.68 = 471,109.86 : x
2. Step 2: Convert to fraction form
   616,139.85/849,061.68 = 471,109.86/x
3. Step 3: Cross multiply
   616,139.85x = 849,061.68 × 471,109.86
4. Step 4: Simplify right side
   616,139.85x = 400,001,329,196.17
5. Step 5: Solve for x
   x = 400,001,329,196.17/616,139.85
6. Step 6: Final answer
   x = 649,205.42