Finding the Fourth Proportional to 1,715.55, 2,404.20 and 1,715.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,715.55 : 2,404.20 = 1,715.55 : x
2. Step 2: Convert to fraction form
   1,715.55/2,404.20 = 1,715.55/x
3. Step 3: Cross multiply
   1,715.55x = 2,404.20 × 1,715.55
4. Step 4: Simplify right side
   1,715.55x = 4,124,525.31
5. Step 5: Solve for x
   x = 4,124,525.31/1,715.55
6. Step 6: Final answer
   x = 2,404.20