Finding the Fourth Proportional to 78,499.32, 108,328.68 and 42,689.04

Step by Step Solution

1. Step 1: Write the proportion equation
   78,499.32 : 108,328.68 = 42,689.04 : x
2. Step 2: Convert to fraction form
   78,499.32/108,328.68 = 42,689.04/x
3. Step 3: Cross multiply
   78,499.32x = 108,328.68 × 42,689.04
4. Step 4: Simplify right side
   78,499.32x = 4,624,447,353.67
5. Step 5: Solve for x
   x = 4,624,447,353.67/78,499.32
6. Step 6: Final answer
   x = 58,910.67