Finding the Fourth Proportional to 154,645.92, 231,748.56 and 91,478.88

Step by Step Solution

1. Step 1: Write the proportion equation
   154,645.92 : 231,748.56 = 91,478.88 : x
2. Step 2: Convert to fraction form
   154,645.92/231,748.56 = 91,478.88/x
3. Step 3: Cross multiply
   154,645.92x = 231,748.56 × 91,478.88
4. Step 4: Simplify right side
   154,645.92x = 21,200,098,710.41
5. Step 5: Solve for x
   x = 21,200,098,710.41/154,645.92
6. Step 6: Final answer
   x = 137,087.99