Finding the Fourth Proportional to 139,793.85, 209,483.42 and 102,676.41

Step by Step Solution

1. Step 1: Write the proportion equation
   139,793.85 : 209,483.42 = 102,676.41 : x
2. Step 2: Convert to fraction form
   139,793.85/209,483.42 = 102,676.41/x
3. Step 3: Cross multiply
   139,793.85x = 209,483.42 × 102,676.41
4. Step 4: Simplify right side
   139,793.85x = 21,509,005,006.74
5. Step 5: Solve for x
   x = 21,509,005,006.74/139,793.85
6. Step 6: Final answer
   x = 153,862.31