Finding the Fourth Proportional to 14,113.10, 21,111.32 and 12,830.06

Step by Step Solution

1. Step 1: Write the proportion equation
   14,113.10 : 21,111.32 = 12,830.06 : x
2. Step 2: Convert to fraction form
   14,113.10/21,111.32 = 12,830.06/x
3. Step 3: Cross multiply
   14,113.10x = 21,111.32 × 12,830.06
4. Step 4: Simplify right side
   14,113.10x = 270,859,502.28
5. Step 5: Solve for x
   x = 270,859,502.28/14,113.10
6. Step 6: Final answer
   x = 19,192.06