Finding the Fourth Proportional to 78,719.04, 108,632.32 and 42,909.12

Step by Step Solution

1. Step 1: Write the proportion equation
   78,719.04 : 108,632.32 = 42,909.12 : x
2. Step 2: Convert to fraction form
   78,719.04/108,632.32 = 42,909.12/x
3. Step 3: Cross multiply
   78,719.04x = 108,632.32 × 42,909.12
4. Step 4: Simplify right side
   78,719.04x = 4,661,317,254.76
5. Step 5: Solve for x
   x = 4,661,317,254.76/78,719.04
6. Step 6: Final answer
   x = 59,214.61