Finding the Fourth Proportional to 42,780.72, 59,028.12 and 23,917.20

Step by Step Solution

1. Step 1: Write the proportion equation
   42,780.72 : 59,028.12 = 23,917.20 : x
2. Step 2: Convert to fraction form
   42,780.72/59,028.12 = 23,917.20/x
3. Step 3: Cross multiply
   42,780.72x = 59,028.12 × 23,917.20
4. Step 4: Simplify right side
   42,780.72x = 1,411,787,351.66
5. Step 5: Solve for x
   x = 1,411,787,351.66/42,780.72
6. Step 6: Final answer
   x = 33,000.55