Finding the Fourth Proportional to 42,042.90, 63,064.18 and 13,965.10

Step by Step Solution

1. Step 1: Write the proportion equation
   42,042.90 : 63,064.18 = 13,965.10 : x
2. Step 2: Convert to fraction form
   42,042.90/63,064.18 = 13,965.10/x
3. Step 3: Cross multiply
   42,042.90x = 63,064.18 × 13,965.10
4. Step 4: Simplify right side
   42,042.90x = 880,697,580.12
5. Step 5: Solve for x
   x = 880,697,580.12/42,042.90
6. Step 6: Final answer
   x = 20,947.59