Finding the Fourth Proportional to 139,861.28, 209,678.08 and 65,028.56

Step by Step Solution

1. Step 1: Write the proportion equation
   139,861.28 : 209,678.08 = 65,028.56 : x
2. Step 2: Convert to fraction form
   139,861.28/209,678.08 = 65,028.56/x
3. Step 3: Cross multiply
   139,861.28x = 209,678.08 × 65,028.56
4. Step 4: Simplify right side
   139,861.28x = 13,635,063,605.96
5. Step 5: Solve for x
   x = 13,635,063,605.96/139,861.28
6. Step 6: Final answer
   x = 97,489.91