Finding the Fourth Proportional to 139,529.68, 209,289.82 and 60,643.92

Step by Step Solution

1. Step 1: Write the proportion equation
   139,529.68 : 209,289.82 = 60,643.92 : x
2. Step 2: Convert to fraction form
   139,529.68/209,289.82 = 60,643.92/x
3. Step 3: Cross multiply
   139,529.68x = 209,289.82 × 60,643.92
4. Step 4: Simplify right side
   139,529.68x = 12,692,155,100.89
5. Step 5: Solve for x
   x = 12,692,155,100.89/139,529.68
6. Step 6: Final answer
   x = 90,963.84