Finding the Fourth Proportional to 12,886.95, 17,792.52 and 9,897.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,886.95 : 17,792.52 = 9,897.42 : x
2. Step 2: Convert to fraction form
   12,886.95/17,792.52 = 9,897.42/x
3. Step 3: Cross multiply
   12,886.95x = 17,792.52 × 9,897.42
4. Step 4: Simplify right side
   12,886.95x = 176,100,043.30
5. Step 5: Solve for x
   x = 176,100,043.30/12,886.95
6. Step 6: Final answer
   x = 13,664.99