Finding the Fourth Proportional to 149,667.46, 206,541.71 and 81,685.87

Step by Step Solution

1. Step 1: Write the proportion equation
   149,667.46 : 206,541.71 = 81,685.87 : x
2. Step 2: Convert to fraction form
   149,667.46/206,541.71 = 81,685.87/x
3. Step 3: Cross multiply
   149,667.46x = 206,541.71 × 81,685.87
4. Step 4: Simplify right side
   149,667.46x = 16,871,539,272.64
5. Step 5: Solve for x
   x = 16,871,539,272.64/149,667.46
6. Step 6: Final answer
   x = 112,726.84