Finding the Fourth Proportional to 144,155.72, 198,926.30 and 83,722.20

Step by Step Solution

1. Step 1: Write the proportion equation
   144,155.72 : 198,926.30 = 83,722.20 : x
2. Step 2: Convert to fraction form
   144,155.72/198,926.30 = 83,722.20/x
3. Step 3: Cross multiply
   144,155.72x = 198,926.30 × 83,722.20
4. Step 4: Simplify right side
   144,155.72x = 16,654,547,473.86
5. Step 5: Solve for x
   x = 16,654,547,473.86/144,155.72
6. Step 6: Final answer
   x = 115,531.65