Finding the Fourth Proportional to 21,043, 31,575.30 and 10,655.02

Step by Step Solution

1. Step 1: Write the proportion equation
   21,043 : 31,575.30 = 10,655.02 : x
2. Step 2: Convert to fraction form
   21,043/31,575.30 = 10,655.02/x
3. Step 3: Cross multiply
   21,043x = 31,575.30 × 10,655.02
4. Step 4: Simplify right side
   21,043x = 336,435,453.01
5. Step 5: Solve for x
   x = 336,435,453.01/21,043
6. Step 6: Final answer
   x = 15,988.00