Finding the Fourth Proportional to 185,391.68, 278,109.12 and 67,118.72

Step by Step Solution

1. Step 1: Write the proportion equation
   185,391.68 : 278,109.12 = 67,118.72 : x
2. Step 2: Convert to fraction form
   185,391.68/278,109.12 = 67,118.72/x
3. Step 3: Cross multiply
   185,391.68x = 278,109.12 × 67,118.72
4. Step 4: Simplify right side
   185,391.68x = 18,666,328,154.73
5. Step 5: Solve for x
   x = 18,666,328,154.73/185,391.68
6. Step 6: Final answer
   x = 100,685.90