Finding the Fourth Proportional to 42,375.30, 63,559.86 and 19,891.10

Step by Step Solution

1. Step 1: Write the proportion equation
   42,375.30 : 63,559.86 = 19,891.10 : x
2. Step 2: Convert to fraction form
   42,375.30/63,559.86 = 19,891.10/x
3. Step 3: Cross multiply
   42,375.30x = 63,559.86 × 19,891.10
4. Step 4: Simplify right side
   42,375.30x = 1,264,275,615.55
5. Step 5: Solve for x
   x = 1,264,275,615.55/42,375.30
6. Step 6: Final answer
   x = 29,835.20