Finding the Fourth Proportional to 20,899.02, 31,353.72 and 10,373.98

Step by Step Solution

1. Step 1: Write the proportion equation
   20,899.02 : 31,353.72 = 10,373.98 : x
2. Step 2: Convert to fraction form
   20,899.02/31,353.72 = 10,373.98/x
3. Step 3: Cross multiply
   20,899.02x = 31,353.72 × 10,373.98
4. Step 4: Simplify right side
   20,899.02x = 325,262,864.21
5. Step 5: Solve for x
   x = 325,262,864.21/20,899.02
6. Step 6: Final answer
   x = 15,563.55