Finding the Fourth Proportional to 76,989.33, 106,242.17 and 42,997.28

Step by Step Solution

1. Step 1: Write the proportion equation
   76,989.33 : 106,242.17 = 42,997.28 : x
2. Step 2: Convert to fraction form
   76,989.33/106,242.17 = 42,997.28/x
3. Step 3: Cross multiply
   76,989.33x = 106,242.17 × 42,997.28
4. Step 4: Simplify right side
   76,989.33x = 4,568,123,585.10
5. Step 5: Solve for x
   x = 4,568,123,585.10/76,989.33
6. Step 6: Final answer
   x = 59,334.50