Finding the Fourth Proportional to 139,867.28, 209,687.04 and 65,034.56

Step by Step Solution

1. Step 1: Write the proportion equation
   139,867.28 : 209,687.04 = 65,034.56 : x
2. Step 2: Convert to fraction form
   139,867.28/209,687.04 = 65,034.56/x
3. Step 3: Cross multiply
   139,867.28x = 209,687.04 × 65,034.56
4. Step 4: Simplify right side
   139,867.28x = 13,636,904,384.10
5. Step 5: Solve for x
   x = 13,636,904,384.10/139,867.28
6. Step 6: Final answer
   x = 97,498.89