Finding the Fourth Proportional to 21,142.17, 31,714.29 and 17,437.53

Step by Step Solution

1. Step 1: Write the proportion equation
   21,142.17 : 31,714.29 = 17,437.53 : x
2. Step 2: Convert to fraction form
   21,142.17/31,714.29 = 17,437.53/x
3. Step 3: Cross multiply
   21,142.17x = 31,714.29 × 17,437.53
4. Step 4: Simplify right side
   21,142.17x = 553,018,883.30
5. Step 5: Solve for x
   x = 553,018,883.30/21,142.17
6. Step 6: Final answer
   x = 26,157.15