Finding the Fourth Proportional to 139,996.42, 209,861.62 and 89,253.02

Step by Step Solution

1. Step 1: Write the proportion equation
   139,996.42 : 209,861.62 = 89,253.02 : x
2. Step 2: Convert to fraction form
   139,996.42/209,861.62 = 89,253.02/x
3. Step 3: Cross multiply
   139,996.42x = 209,861.62 × 89,253.02
4. Step 4: Simplify right side
   139,996.42x = 18,730,783,668.61
5. Step 5: Solve for x
   x = 18,730,783,668.61/139,996.42
6. Step 6: Final answer
   x = 133,794.74