Finding the Fourth Proportional to 78,344.77, 108,162.90 and 73,861.42

Step by Step Solution

1. Step 1: Write the proportion equation
   78,344.77 : 108,162.90 = 73,861.42 : x
2. Step 2: Convert to fraction form
   78,344.77/108,162.90 = 73,861.42/x
3. Step 3: Cross multiply
   78,344.77x = 108,162.90 × 73,861.42
4. Step 4: Simplify right side
   78,344.77x = 7,989,065,385.32
5. Step 5: Solve for x
   x = 7,989,065,385.32/78,344.77
6. Step 6: Final answer
   x = 101,973.18