Finding the Fourth Proportional to 109,143.32, 150,186.30 and 91,180.76

Step by Step Solution

1. Step 1: Write the proportion equation
   109,143.32 : 150,186.30 = 91,180.76 : x
2. Step 2: Convert to fraction form
   109,143.32/150,186.30 = 91,180.76/x
3. Step 3: Cross multiply
   109,143.32x = 150,186.30 × 91,180.76
4. Step 4: Simplify right side
   109,143.32x = 13,694,100,975.59
5. Step 5: Solve for x
   x = 13,694,100,975.59/109,143.32
6. Step 6: Final answer
   x = 125,468.98