Finding the Fourth Proportional to 21,009.04, 31,490.52 and 10,042

Step by Step Solution

1. Step 1: Write the proportion equation
   21,009.04 : 31,490.52 = 10,042 : x
2. Step 2: Convert to fraction form
   21,009.04/31,490.52 = 10,042/x
3. Step 3: Cross multiply
   21,009.04x = 31,490.52 × 10,042
4. Step 4: Simplify right side
   21,009.04x = 316,227,801.84
5. Step 5: Solve for x
   x = 316,227,801.84/21,009.04
6. Step 6: Final answer
   x = 15,051.99