Finding the Fourth Proportional to 231,109.47, 318,933.18 and 135,617.76

Step by Step Solution

1. Step 1: Write the proportion equation
   231,109.47 : 318,933.18 = 135,617.76 : x
2. Step 2: Convert to fraction form
   231,109.47/318,933.18 = 135,617.76/x
3. Step 3: Cross multiply
   231,109.47x = 318,933.18 × 135,617.76
4. Step 4: Simplify right side
   231,109.47x = 43,253,003,461.28
5. Step 5: Solve for x
   x = 43,253,003,461.28/231,109.47
6. Step 6: Final answer
   x = 187,153.75