Finding the Fourth Proportional to 85,788.72, 128,718.42 and 37,732.64

Step by Step Solution

1. Step 1: Write the proportion equation
   85,788.72 : 128,718.42 = 37,732.64 : x
2. Step 2: Convert to fraction form
   85,788.72/128,718.42 = 37,732.64/x
3. Step 3: Cross multiply
   85,788.72x = 128,718.42 × 37,732.64
4. Step 4: Simplify right side
   85,788.72x = 4,856,885,018.14
5. Step 5: Solve for x
   x = 4,856,885,018.14/85,788.72
6. Step 6: Final answer
   x = 56,614.49