Finding the Fourth Proportional to 476,883.86, 715,436.58 and 139,910.90

Step by Step Solution

1. Step 1: Write the proportion equation
   476,883.86 : 715,436.58 = 139,910.90 : x
2. Step 2: Convert to fraction form
   476,883.86/715,436.58 = 139,910.90/x
3. Step 3: Cross multiply
   476,883.86x = 715,436.58 × 139,910.90
4. Step 4: Simplify right side
   476,883.86x = 100,097,375,800.72
5. Step 5: Solve for x
   x = 100,097,375,800.72/476,883.86
6. Step 6: Final answer
   x = 209,898.85