Finding the Fourth Proportional to 139,726.27, 209,449.27 and 64,898.97

Step by Step Solution

1. Step 1: Write the proportion equation
   139,726.27 : 209,449.27 = 64,898.97 : x
2. Step 2: Convert to fraction form
   139,726.27/209,449.27 = 64,898.97/x
3. Step 3: Cross multiply
   139,726.27x = 209,449.27 × 64,898.97
4. Step 4: Simplify right side
   139,726.27x = 13,593,040,820.88
5. Step 5: Solve for x
   x = 13,593,040,820.88/139,726.27
6. Step 6: Final answer
   x = 97,283.36