Finding the Fourth Proportional to 76,611.67, 105,724.91 and 42,156.86

Step by Step Solution

1. Step 1: Write the proportion equation
   76,611.67 : 105,724.91 = 42,156.86 : x
2. Step 2: Convert to fraction form
   76,611.67/105,724.91 = 42,156.86/x
3. Step 3: Cross multiply
   76,611.67x = 105,724.91 × 42,156.86
4. Step 4: Simplify right side
   76,611.67x = 4,457,029,806.15
5. Step 5: Solve for x
   x = 4,457,029,806.15/76,611.67
6. Step 6: Final answer
   x = 58,176.91