Finding the Fourth Proportional to 143,123.31, 197,512.11 and 78,595.89

Step by Step Solution

1. Step 1: Write the proportion equation
   143,123.31 : 197,512.11 = 78,595.89 : x
2. Step 2: Convert to fraction form
   143,123.31/197,512.11 = 78,595.89/x
3. Step 3: Cross multiply
   143,123.31x = 197,512.11 × 78,595.89
4. Step 4: Simplify right side
   143,123.31x = 15,523,640,071.23
5. Step 5: Solve for x
   x = 15,523,640,071.23/143,123.31
6. Step 6: Final answer
   x = 108,463.39