Finding the Fourth Proportional to 21,083.12, 29,090.04 and 12,702.32

Step by Step Solution

1. Step 1: Write the proportion equation
   21,083.12 : 29,090.04 = 12,702.32 : x
2. Step 2: Convert to fraction form
   21,083.12/29,090.04 = 12,702.32/x
3. Step 3: Cross multiply
   21,083.12x = 29,090.04 × 12,702.32
4. Step 4: Simplify right side
   21,083.12x = 369,510,996.89
5. Step 5: Solve for x
   x = 369,510,996.89/21,083.12
6. Step 6: Final answer
   x = 17,526.39