Finding the Fourth Proportional to 76,560.50, 105,657 and 42,572.46

Step by Step Solution

1. Step 1: Write the proportion equation
   76,560.50 : 105,657 = 42,572.46 : x
2. Step 2: Convert to fraction form
   76,560.50/105,657 = 42,572.46/x
3. Step 3: Cross multiply
   76,560.50x = 105,657 × 42,572.46
4. Step 4: Simplify right side
   76,560.50x = 4,498,078,406.22
5. Step 5: Solve for x
   x = 4,498,078,406.22/76,560.50
6. Step 6: Final answer
   x = 58,751.95