Finding the Fourth Proportional to 140,061.15, 209,925.68 and 80,774.42

Step by Step Solution

1. Step 1: Write the proportion equation
   140,061.15 : 209,925.68 = 80,774.42 : x
2. Step 2: Convert to fraction form
   140,061.15/209,925.68 = 80,774.42/x
3. Step 3: Cross multiply
   140,061.15x = 209,925.68 × 80,774.42
4. Step 4: Simplify right side
   140,061.15x = 16,956,623,591.61
5. Step 5: Solve for x
   x = 16,956,623,591.61/140,061.15
6. Step 6: Final answer
   x = 121,065.86