Finding the Fourth Proportional to 12,918.06, 19,391.67 and 5,132.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,918.06 : 19,391.67 = 5,132.34 : x
2. Step 2: Convert to fraction form
   12,918.06/19,391.67 = 5,132.34/x
3. Step 3: Cross multiply
   12,918.06x = 19,391.67 × 5,132.34
4. Step 4: Simplify right side
   12,918.06x = 99,524,643.61
5. Step 5: Solve for x
   x = 99,524,643.61/12,918.06
6. Step 6: Final answer
   x = 7,704.30