Finding the Fourth Proportional to 42,599.88, 63,906.03 and 13,013.91

Step by Step Solution

1. Step 1: Write the proportion equation
   42,599.88 : 63,906.03 = 13,013.91 : x
2. Step 2: Convert to fraction form
   42,599.88/63,906.03 = 13,013.91/x
3. Step 3: Cross multiply
   42,599.88x = 63,906.03 × 13,013.91
4. Step 4: Simplify right side
   42,599.88x = 831,667,322.88
5. Step 5: Solve for x
   x = 831,667,322.88/42,599.88
6. Step 6: Final answer
   x = 19,522.76