Finding the Fourth Proportional to 12,837.02, 19,223.40 and 8,142.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,837.02 : 19,223.40 = 8,142.80 : x
2. Step 2: Convert to fraction form
   12,837.02/19,223.40 = 8,142.80/x
3. Step 3: Cross multiply
   12,837.02x = 19,223.40 × 8,142.80
4. Step 4: Simplify right side
   12,837.02x = 156,532,301.52
5. Step 5: Solve for x
   x = 156,532,301.52/12,837.02
6. Step 6: Final answer
   x = 12,193.82