Finding the Fourth Proportional to 12,457.20, 17,309.96 and 12,300.01

Step by Step Solution

1. Step 1: Write the proportion equation
   12,457.20 : 17,309.96 = 12,300.01 : x
2. Step 2: Convert to fraction form
   12,457.20/17,309.96 = 12,300.01/x
3. Step 3: Cross multiply
   12,457.20x = 17,309.96 × 12,300.01
4. Step 4: Simplify right side
   12,457.20x = 212,912,733.49
5. Step 5: Solve for x
   x = 212,912,733.49/12,457.20
6. Step 6: Final answer
   x = 17,091.54