Finding the Fourth Proportional to 101,426.60, 139,921.56 and 65,628.15

Step by Step Solution

1. Step 1: Write the proportion equation
   101,426.60 : 139,921.56 = 65,628.15 : x
2. Step 2: Convert to fraction form
   101,426.60/139,921.56 = 65,628.15/x
3. Step 3: Cross multiply
   101,426.60x = 139,921.56 × 65,628.15
4. Step 4: Simplify right side
   101,426.60x = 9,182,793,127.91
5. Step 5: Solve for x
   x = 9,182,793,127.91/101,426.60
6. Step 6: Final answer
   x = 90,536.34