Finding the Fourth Proportional to 76,557.15, 105,648.76 and 42,564.57

Step by Step Solution

1. Step 1: Write the proportion equation
   76,557.15 : 105,648.76 = 42,564.57 : x
2. Step 2: Convert to fraction form
   76,557.15/105,648.76 = 42,564.57/x
3. Step 3: Cross multiply
   76,557.15x = 105,648.76 × 42,564.57
4. Step 4: Simplify right side
   76,557.15x = 4,496,894,040.43
5. Step 5: Solve for x
   x = 4,496,894,040.43/76,557.15
6. Step 6: Final answer
   x = 58,739.05