Finding the Fourth Proportional to 42,595.88, 63,891.18 and 13,011.03

Step by Step Solution

1. Step 1: Write the proportion equation
   42,595.88 : 63,891.18 = 13,011.03 : x
2. Step 2: Convert to fraction form
   42,595.88/63,891.18 = 13,011.03/x
3. Step 3: Cross multiply
   42,595.88x = 63,891.18 × 13,011.03
4. Step 4: Simplify right side
   42,595.88x = 831,290,059.72
5. Step 5: Solve for x
   x = 831,290,059.72/42,595.88
6. Step 6: Final answer
   x = 19,515.74