Finding the Fourth Proportional to 85,921.05, 128,829.81 and 38,527.57

Step by Step Solution

1. Step 1: Write the proportion equation
   85,921.05 : 128,829.81 = 38,527.57 : x
2. Step 2: Convert to fraction form
   85,921.05/128,829.81 = 38,527.57/x
3. Step 3: Cross multiply
   85,921.05x = 128,829.81 × 38,527.57
4. Step 4: Simplify right side
   85,921.05x = 4,963,499,522.86
5. Step 5: Solve for x
   x = 4,963,499,522.86/85,921.05
6. Step 6: Final answer
   x = 57,768.14