Finding the Fourth Proportional to 231,987.86, 320,133.56 and 131,385.86

Step by Step Solution

1. Step 1: Write the proportion equation
   231,987.86 : 320,133.56 = 131,385.86 : x
2. Step 2: Convert to fraction form
   231,987.86/320,133.56 = 131,385.86/x
3. Step 3: Cross multiply
   231,987.86x = 320,133.56 × 131,385.86
4. Step 4: Simplify right side
   231,987.86x = 42,061,023,095.46
5. Step 5: Solve for x
   x = 42,061,023,095.46/231,987.86
6. Step 6: Final answer
   x = 181,307.00