Finding the Fourth Proportional to 148,619.62, 205,131.56 and 91,272.61

Step by Step Solution

1. Step 1: Write the proportion equation
   148,619.62 : 205,131.56 = 91,272.61 : x
2. Step 2: Convert to fraction form
   148,619.62/205,131.56 = 91,272.61/x
3. Step 3: Cross multiply
   148,619.62x = 205,131.56 × 91,272.61
4. Step 4: Simplify right side
   148,619.62x = 18,722,892,674.62
5. Step 5: Solve for x
   x = 18,722,892,674.62/148,619.62
6. Step 6: Final answer
   x = 125,978.61