Finding the Fourth Proportional to 42,642.27, 63,940.78 and 13,052.16

Step by Step Solution

1. Step 1: Write the proportion equation
   42,642.27 : 63,940.78 = 13,052.16 : x
2. Step 2: Convert to fraction form
   42,642.27/63,940.78 = 13,052.16/x
3. Step 3: Cross multiply
   42,642.27x = 63,940.78 × 13,052.16
4. Step 4: Simplify right side
   42,642.27x = 834,565,258.45
5. Step 5: Solve for x
   x = 834,565,258.45/42,642.27
6. Step 6: Final answer
   x = 19,571.31