Finding the Fourth Proportional to 17,085.63, 23,577.48 and 9,915.18

Step by Step Solution

1. Step 1: Write the proportion equation
   17,085.63 : 23,577.48 = 9,915.18 : x
2. Step 2: Convert to fraction form
   17,085.63/23,577.48 = 9,915.18/x
3. Step 3: Cross multiply
   17,085.63x = 23,577.48 × 9,915.18
4. Step 4: Simplify right side
   17,085.63x = 233,774,958.15
5. Step 5: Solve for x
   x = 233,774,958.15/17,085.63
6. Step 6: Final answer
   x = 13,682.55