Finding the Fourth Proportional to 12,964.15, 17,891.10 and 7,301.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,964.15 : 17,891.10 = 7,301.20 : x
2. Step 2: Convert to fraction form
   12,964.15/17,891.10 = 7,301.20/x
3. Step 3: Cross multiply
   12,964.15x = 17,891.10 × 7,301.20
4. Step 4: Simplify right side
   12,964.15x = 130,626,499.32
5. Step 5: Solve for x
   x = 130,626,499.32/12,964.15
6. Step 6: Final answer
   x = 10,075.98