Finding the Fourth Proportional to 17,056.61, 23,538.56 and 9,400.15

Step by Step Solution

1. Step 1: Write the proportion equation
   17,056.61 : 23,538.56 = 9,400.15 : x
2. Step 2: Convert to fraction form
   17,056.61/23,538.56 = 9,400.15/x
3. Step 3: Cross multiply
   17,056.61x = 23,538.56 × 9,400.15
4. Step 4: Simplify right side
   17,056.61x = 221,265,994.78
5. Step 5: Solve for x
   x = 221,265,994.78/17,056.61
6. Step 6: Final answer
   x = 12,972.45