Finding the Fourth Proportional to 140,642.38, 210,680.88 and 65,659.06

Step by Step Solution

1. Step 1: Write the proportion equation
   140,642.38 : 210,680.88 = 65,659.06 : x
2. Step 2: Convert to fraction form
   140,642.38/210,680.88 = 65,659.06/x
3. Step 3: Cross multiply
   140,642.38x = 210,680.88 × 65,659.06
4. Step 4: Simplify right side
   140,642.38x = 13,833,108,540.77
5. Step 5: Solve for x
   x = 13,833,108,540.77/140,642.38
6. Step 6: Final answer
   x = 98,356.62