Finding the Fourth Proportional to 105,691.14, 158,430.12 and 66,275.94

Step by Step Solution

1. Step 1: Write the proportion equation
   105,691.14 : 158,430.12 = 66,275.94 : x
2. Step 2: Convert to fraction form
   105,691.14/158,430.12 = 66,275.94/x
3. Step 3: Cross multiply
   105,691.14x = 158,430.12 × 66,275.94
4. Step 4: Simplify right side
   105,691.14x = 10,500,105,127.31
5. Step 5: Solve for x
   x = 10,500,105,127.31/105,691.14
6. Step 6: Final answer
   x = 99,347.07