Finding the Fourth Proportional to 143,387.83, 197,877.49 and 78,859.89

Step by Step Solution

1. Step 1: Write the proportion equation
   143,387.83 : 197,877.49 = 78,859.89 : x
2. Step 2: Convert to fraction form
   143,387.83/197,877.49 = 78,859.89/x
3. Step 3: Cross multiply
   143,387.83x = 197,877.49 × 78,859.89
4. Step 4: Simplify right side
   143,387.83x = 15,604,596,897.73
5. Step 5: Solve for x
   x = 15,604,596,897.73/143,387.83
6. Step 6: Final answer
   x = 108,827.91