Finding the Fourth Proportional to 85,685.52, 128,507.58 and 33,061.44

Step by Step Solution

1. Step 1: Write the proportion equation
   85,685.52 : 128,507.58 = 33,061.44 : x
2. Step 2: Convert to fraction form
   85,685.52/128,507.58 = 33,061.44/x
3. Step 3: Cross multiply
   85,685.52x = 128,507.58 × 33,061.44
4. Step 4: Simplify right side
   85,685.52x = 4,248,645,645.72
5. Step 5: Solve for x
   x = 4,248,645,645.72/85,685.52
6. Step 6: Final answer
   x = 49,584.17