Finding the Fourth Proportional to 148,889.52, 205,499.94 and 91,578.09

Step by Step Solution

1. Step 1: Write the proportion equation
   148,889.52 : 205,499.94 = 91,578.09 : x
2. Step 2: Convert to fraction form
   148,889.52/205,499.94 = 91,578.09/x
3. Step 3: Cross multiply
   148,889.52x = 205,499.94 × 91,578.09
4. Step 4: Simplify right side
   148,889.52x = 18,819,292,000.31
5. Step 5: Solve for x
   x = 18,819,292,000.31/148,889.52
6. Step 6: Final answer
   x = 126,397.69