Finding the Fourth Proportional to 99,760.46, 149,402.34 and 55,276.88

Step by Step Solution

1. Step 1: Write the proportion equation
   99,760.46 : 149,402.34 = 55,276.88 : x
2. Step 2: Convert to fraction form
   99,760.46/149,402.34 = 55,276.88/x
3. Step 3: Cross multiply
   99,760.46x = 149,402.34 × 55,276.88
4. Step 4: Simplify right side
   99,760.46x = 8,258,494,472.89
5. Step 5: Solve for x
   x = 8,258,494,472.89/99,760.46
6. Step 6: Final answer
   x = 82,783.25