Finding the Fourth Proportional to 12,904, 17,807.40 and 7,315

Step by Step Solution

1. Step 1: Write the proportion equation
   12,904 : 17,807.40 = 7,315 : x
2. Step 2: Convert to fraction form
   12,904/17,807.40 = 7,315/x
3. Step 3: Cross multiply
   12,904x = 17,807.40 × 7,315
4. Step 4: Simplify right side
   12,904x = 130,261,131.00
5. Step 5: Solve for x
   x = 130,261,131.00/12,904
6. Step 6: Final answer
   x = 10,094.63