Finding the Fourth Proportional to 23,719.88, 35,600.28 and 13,200.42

Step by Step Solution

1. Step 1: Write the proportion equation
   23,719.88 : 35,600.28 = 13,200.42 : x
2. Step 2: Convert to fraction form
   23,719.88/35,600.28 = 13,200.42/x
3. Step 3: Cross multiply
   23,719.88x = 35,600.28 × 13,200.42
4. Step 4: Simplify right side
   23,719.88x = 469,938,648.12
5. Step 5: Solve for x
   x = 469,938,648.12/23,719.88
6. Step 6: Final answer
   x = 19,812.02