Finding the Fourth Proportional to 112,772.40, 155,642.49 and 65,016.42

Step by Step Solution

1. Step 1: Write the proportion equation
   112,772.40 : 155,642.49 = 65,016.42 : x
2. Step 2: Convert to fraction form
   112,772.40/155,642.49 = 65,016.42/x
3. Step 3: Cross multiply
   112,772.40x = 155,642.49 × 65,016.42
4. Step 4: Simplify right side
   112,772.40x = 10,119,317,499.69
5. Step 5: Solve for x
   x = 10,119,317,499.69/112,772.40
6. Step 6: Final answer
   x = 89,732.22