Finding the Fourth Proportional to 78,797.10, 108,737.85 and 42,987.10

Step by Step Solution

1. Step 1: Write the proportion equation
   78,797.10 : 108,737.85 = 42,987.10 : x
2. Step 2: Convert to fraction form
   78,797.10/108,737.85 = 42,987.10/x
3. Step 3: Cross multiply
   78,797.10x = 108,737.85 × 42,987.10
4. Step 4: Simplify right side
   78,797.10x = 4,674,324,928.55
5. Step 5: Solve for x
   x = 4,674,324,928.55/78,797.10
6. Step 6: Final answer
   x = 59,321.03