Finding the Fourth Proportional to 12,969.55, 17,897.25 and 7,664.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,969.55 : 17,897.25 = 7,664.86 : x
2. Step 2: Convert to fraction form
   12,969.55/17,897.25 = 7,664.86/x
3. Step 3: Cross multiply
   12,969.55x = 17,897.25 × 7,664.86
4. Step 4: Simplify right side
   12,969.55x = 137,179,915.64
5. Step 5: Solve for x
   x = 137,179,915.64/12,969.55
6. Step 6: Final answer
   x = 10,577.08