Finding the Fourth Proportional to 1,715.49, 2,365.47 and 1,242.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,715.49 : 2,365.47 = 1,242.45 : x
2. Step 2: Convert to fraction form
   1,715.49/2,365.47 = 1,242.45/x
3. Step 3: Cross multiply
   1,715.49x = 2,365.47 × 1,242.45
4. Step 4: Simplify right side
   1,715.49x = 2,938,978.20
5. Step 5: Solve for x
   x = 2,938,978.20/1,715.49
6. Step 6: Final answer
   x = 1,713.20