Finding the Fourth Proportional to 143,051.57, 197,391 and 85,677.45

Step by Step Solution

1. Step 1: Write the proportion equation
   143,051.57 : 197,391 = 85,677.45 : x
2. Step 2: Convert to fraction form
   143,051.57/197,391 = 85,677.45/x
3. Step 3: Cross multiply
   143,051.57x = 197,391 × 85,677.45
4. Step 4: Simplify right side
   143,051.57x = 16,911,957,532.95
5. Step 5: Solve for x
   x = 16,911,957,532.95/143,051.57
6. Step 6: Final answer
   x = 118,222.80