Finding the Fourth Proportional to 78,331.86, 108,099.09 and 42,521.94

Step by Step Solution

1. Step 1: Write the proportion equation
   78,331.86 : 108,099.09 = 42,521.94 : x
2. Step 2: Convert to fraction form
   78,331.86/108,099.09 = 42,521.94/x
3. Step 3: Cross multiply
   78,331.86x = 108,099.09 × 42,521.94
4. Step 4: Simplify right side
   78,331.86x = 4,596,583,019.03
5. Step 5: Solve for x
   x = 4,596,583,019.03/78,331.86
6. Step 6: Final answer
   x = 58,680.89