Finding the Fourth Proportional to 76,211.52, 105,166.82 and 42,217.72

Step by Step Solution

1. Step 1: Write the proportion equation
   76,211.52 : 105,166.82 = 42,217.72 : x
2. Step 2: Convert to fraction form
   76,211.52/105,166.82 = 42,217.72/x
3. Step 3: Cross multiply
   76,211.52x = 105,166.82 × 42,217.72
4. Step 4: Simplify right side
   76,211.52x = 4,439,903,360.05
5. Step 5: Solve for x
   x = 4,439,903,360.05/76,211.52
6. Step 6: Final answer
   x = 58,257.64