Finding the Fourth Proportional to 71,065.30, 106,588.24 and 21,153.10

Step by Step Solution

1. Step 1: Write the proportion equation
   71,065.30 : 106,588.24 = 21,153.10 : x
2. Step 2: Convert to fraction form
   71,065.30/106,588.24 = 21,153.10/x
3. Step 3: Cross multiply
   71,065.30x = 106,588.24 × 21,153.10
4. Step 4: Simplify right side
   71,065.30x = 2,254,671,699.54
5. Step 5: Solve for x
   x = 2,254,671,699.54/71,065.30
6. Step 6: Final answer
   x = 31,726.76