Finding the Fourth Proportional to 1,715.15, 2,570.71 and 1,520.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,715.15 : 2,570.71 = 1,520.52 : x
2. Step 2: Convert to fraction form
   1,715.15/2,570.71 = 1,520.52/x
3. Step 3: Cross multiply
   1,715.15x = 2,570.71 × 1,520.52
4. Step 4: Simplify right side
   1,715.15x = 3,908,802.53
5. Step 5: Solve for x
   x = 3,908,802.53/1,715.15
6. Step 6: Final answer
   x = 2,278.99