Finding the Fourth Proportional to 109,399.76, 149,987.12 and 107,406.96

Step by Step Solution

1. Step 1: Write the proportion equation
   109,399.76 : 149,987.12 = 107,406.96 : x
2. Step 2: Convert to fraction form
   109,399.76/149,987.12 = 107,406.96/x
3. Step 3: Cross multiply
   109,399.76x = 149,987.12 × 107,406.96
4. Step 4: Simplify right side
   109,399.76x = 16,109,659,311.38
5. Step 5: Solve for x
   x = 16,109,659,311.38/109,399.76
6. Step 6: Final answer
   x = 147,254.98