Finding the Fourth Proportional to 85,659.72, 128,498.18 and 29,492.39

Step by Step Solution

1. Step 1: Write the proportion equation
   85,659.72 : 128,498.18 = 29,492.39 : x
2. Step 2: Convert to fraction form
   85,659.72/128,498.18 = 29,492.39/x
3. Step 3: Cross multiply
   85,659.72x = 128,498.18 × 29,492.39
4. Step 4: Simplify right side
   85,659.72x = 3,789,718,438.85
5. Step 5: Solve for x
   x = 3,789,718,438.85/85,659.72
6. Step 6: Final answer
   x = 44,241.55