Finding the Fourth Proportional to 138,527.30, 207,272.55 and 91,871.30

Step by Step Solution

1. Step 1: Write the proportion equation
   138,527.30 : 207,272.55 = 91,871.30 : x
2. Step 2: Convert to fraction form
   138,527.30/207,272.55 = 91,871.30/x
3. Step 3: Cross multiply
   138,527.30x = 207,272.55 × 91,871.30
4. Step 4: Simplify right side
   138,527.30x = 19,042,398,622.82
5. Step 5: Solve for x
   x = 19,042,398,622.82/138,527.30
6. Step 6: Final answer
   x = 137,463.15