Finding the Fourth Proportional to 21,348.51, 29,462.12 and 12,398.82

Step by Step Solution

1. Step 1: Write the proportion equation
   21,348.51 : 29,462.12 = 12,398.82 : x
2. Step 2: Convert to fraction form
   21,348.51/29,462.12 = 12,398.82/x
3. Step 3: Cross multiply
   21,348.51x = 29,462.12 × 12,398.82
4. Step 4: Simplify right side
   21,348.51x = 365,295,460.70
5. Step 5: Solve for x
   x = 365,295,460.70/21,348.51
6. Step 6: Final answer
   x = 17,111.05