Finding the Fourth Proportional to 2,307.90, 3,180.15 and 1,782.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,307.90 : 3,180.15 = 1,782.30 : x
2. Step 2: Convert to fraction form
   2,307.90/3,180.15 = 1,782.30/x
3. Step 3: Cross multiply
   2,307.90x = 3,180.15 × 1,782.30
4. Step 4: Simplify right side
   2,307.90x = 5,667,981.35
5. Step 5: Solve for x
   x = 5,667,981.35/2,307.90
6. Step 6: Final answer
   x = 2,455.90