Finding the Fourth Proportional to 76,128.78, 114,026.42 and 38,624.42

Step by Step Solution

1. Step 1: Write the proportion equation
   76,128.78 : 114,026.42 = 38,624.42 : x
2. Step 2: Convert to fraction form
   76,128.78/114,026.42 = 38,624.42/x
3. Step 3: Cross multiply
   76,128.78x = 114,026.42 × 38,624.42
4. Step 4: Simplify right side
   76,128.78x = 4,404,204,337.18
5. Step 5: Solve for x
   x = 4,404,204,337.18/76,128.78
6. Step 6: Final answer
   x = 57,852.03