Finding the Fourth Proportional to 42,139.64, 63,227.92 and 19,968.86

Step by Step Solution

1. Step 1: Write the proportion equation
   42,139.64 : 63,227.92 = 19,968.86 : x
2. Step 2: Convert to fraction form
   42,139.64/63,227.92 = 19,968.86/x
3. Step 3: Cross multiply
   42,139.64x = 63,227.92 × 19,968.86
4. Step 4: Simplify right side
   42,139.64x = 1,262,589,482.57
5. Step 5: Solve for x
   x = 1,262,589,482.57/42,139.64
6. Step 6: Final answer
   x = 29,962.04