Finding the Fourth Proportional to 76,711.98, 105,861.68 and 42,719.72

Step by Step Solution

1. Step 1: Write the proportion equation
   76,711.98 : 105,861.68 = 42,719.72 : x
2. Step 2: Convert to fraction form
   76,711.98/105,861.68 = 42,719.72/x
3. Step 3: Cross multiply
   76,711.98x = 105,861.68 × 42,719.72
4. Step 4: Simplify right side
   76,711.98x = 4,522,381,539.58
5. Step 5: Solve for x
   x = 4,522,381,539.58/76,711.98
6. Step 6: Final answer
   x = 58,952.74