Finding the Fourth Proportional to 148,889.50, 205,499.92 and 91,578.10

Step by Step Solution

1. Step 1: Write the proportion equation
   148,889.50 : 205,499.92 = 91,578.10 : x
2. Step 2: Convert to fraction form
   148,889.50/205,499.92 = 91,578.10/x
3. Step 3: Cross multiply
   148,889.50x = 205,499.92 × 91,578.10
4. Step 4: Simplify right side
   148,889.50x = 18,819,292,223.75
5. Step 5: Solve for x
   x = 18,819,292,223.75/148,889.50
6. Step 6: Final answer
   x = 126,397.71