Finding the Fourth Proportional to 12,085.34, 16,668.15 and 9,985.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,085.34 : 16,668.15 = 9,985.82 : x
2. Step 2: Convert to fraction form
   12,085.34/16,668.15 = 9,985.82/x
3. Step 3: Cross multiply
   12,085.34x = 16,668.15 × 9,985.82
4. Step 4: Simplify right side
   12,085.34x = 166,445,145.63
5. Step 5: Solve for x
   x = 166,445,145.63/12,085.34
6. Step 6: Final answer
   x = 13,772.48