Finding the Fourth Proportional to 12,932.93, 19,402.98 and 5,147.21

Step by Step Solution

1. Step 1: Write the proportion equation
   12,932.93 : 19,402.98 = 5,147.21 : x
2. Step 2: Convert to fraction form
   12,932.93/19,402.98 = 5,147.21/x
3. Step 3: Cross multiply
   12,932.93x = 19,402.98 × 5,147.21
4. Step 4: Simplify right side
   12,932.93x = 99,871,241.89
5. Step 5: Solve for x
   x = 99,871,241.89/12,932.93
6. Step 6: Final answer
   x = 7,722.24