Finding the Fourth Proportional to 17,406.88, 24,003.96 and 15,486.72

Step by Step Solution

1. Step 1: Write the proportion equation
   17,406.88 : 24,003.96 = 15,486.72 : x
2. Step 2: Convert to fraction form
   17,406.88/24,003.96 = 15,486.72/x
3. Step 3: Cross multiply
   17,406.88x = 24,003.96 × 15,486.72
4. Step 4: Simplify right side
   17,406.88x = 371,742,607.41
5. Step 5: Solve for x
   x = 371,742,607.41/17,406.88
6. Step 6: Final answer
   x = 21,356.07