Finding the Fourth Proportional to 1,618.02, 2,426.52 and 522.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,618.02 : 2,426.52 = 522.15 : x
2. Step 2: Convert to fraction form
   1,618.02/2,426.52 = 522.15/x
3. Step 3: Cross multiply
   1,618.02x = 2,426.52 × 522.15
4. Step 4: Simplify right side
   1,618.02x = 1,267,007.42
5. Step 5: Solve for x
   x = 1,267,007.42/1,618.02
6. Step 6: Final answer
   x = 783.06