Finding the Fourth Proportional to 78,499.12, 108,328.26 and 42,689.04

Step by Step Solution

1. Step 1: Write the proportion equation
   78,499.12 : 108,328.26 = 42,689.04 : x
2. Step 2: Convert to fraction form
   78,499.12/108,328.26 = 42,689.04/x
3. Step 3: Cross multiply
   78,499.12x = 108,328.26 × 42,689.04
4. Step 4: Simplify right side
   78,499.12x = 4,624,429,895.91
5. Step 5: Solve for x
   x = 4,624,429,895.91/78,499.12
6. Step 6: Final answer
   x = 58,910.60