Finding the Fourth Proportional to 139,005, 191,826.90 and 75,342.60

Step by Step Solution

1. Step 1: Write the proportion equation
   139,005 : 191,826.90 = 75,342.60 : x
2. Step 2: Convert to fraction form
   139,005/191,826.90 = 75,342.60/x
3. Step 3: Cross multiply
   139,005x = 191,826.90 × 75,342.60
4. Step 4: Simplify right side
   139,005x = 14,452,737,395.94
5. Step 5: Solve for x
   x = 14,452,737,395.94/139,005
6. Step 6: Final answer
   x = 103,972.79