Finding the Fourth Proportional to 139,433.62, 209,113.07 and 60,529.09

Step by Step Solution

1. Step 1: Write the proportion equation
   139,433.62 : 209,113.07 = 60,529.09 : x
2. Step 2: Convert to fraction form
   139,433.62/209,113.07 = 60,529.09/x
3. Step 3: Cross multiply
   139,433.62x = 209,113.07 × 60,529.09
4. Step 4: Simplify right side
   139,433.62x = 12,657,423,834.21
5. Step 5: Solve for x
   x = 12,657,423,834.21/139,433.62
6. Step 6: Final answer
   x = 90,777.42