Finding the Fourth Proportional to 12,899.22, 17,810.01 and 10,069.74

Step by Step Solution

1. Step 1: Write the proportion equation
   12,899.22 : 17,810.01 = 10,069.74 : x
2. Step 2: Convert to fraction form
   12,899.22/17,810.01 = 10,069.74/x
3. Step 3: Cross multiply
   12,899.22x = 17,810.01 × 10,069.74
4. Step 4: Simplify right side
   12,899.22x = 179,342,170.10
5. Step 5: Solve for x
   x = 179,342,170.10/12,899.22
6. Step 6: Final answer
   x = 13,903.33