Finding the Fourth Proportional to 76,726.88, 105,876.32 and 42,732.80

Step by Step Solution

1. Step 1: Write the proportion equation
   76,726.88 : 105,876.32 = 42,732.80 : x
2. Step 2: Convert to fraction form
   76,726.88/105,876.32 = 42,732.80/x
3. Step 3: Cross multiply
   76,726.88x = 105,876.32 × 42,732.80
4. Step 4: Simplify right side
   76,726.88x = 4,524,391,607.30
5. Step 5: Solve for x
   x = 4,524,391,607.30/76,726.88
6. Step 6: Final answer
   x = 58,967.49