Finding the Fourth Proportional to 341,859.59, 512,789.77 and 89,139.86

Step by Step Solution

1. Step 1: Write the proportion equation
   341,859.59 : 512,789.77 = 89,139.86 : x
2. Step 2: Convert to fraction form
   341,859.59/512,789.77 = 89,139.86/x
3. Step 3: Cross multiply
   341,859.59x = 512,789.77 × 89,139.86
4. Step 4: Simplify right side
   341,859.59x = 45,710,007,777.67
5. Step 5: Solve for x
   x = 45,710,007,777.67/341,859.59
6. Step 6: Final answer
   x = 133,709.89