Finding the Fourth Proportional to 12,964.84, 17,887.30 and 7,661.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,964.84 : 17,887.30 = 7,661.48 : x
2. Step 2: Convert to fraction form
   12,964.84/17,887.30 = 7,661.48/x
3. Step 3: Cross multiply
   12,964.84x = 17,887.30 × 7,661.48
4. Step 4: Simplify right side
   12,964.84x = 137,043,191.20
5. Step 5: Solve for x
   x = 137,043,191.20/12,964.84
6. Step 6: Final answer
   x = 10,570.37