Finding the Fourth Proportional to 1,036.80, 1,552.32 and 522.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,036.80 : 1,552.32 = 522.72 : x
2. Step 2: Convert to fraction form
   1,036.80/1,552.32 = 522.72/x
3. Step 3: Cross multiply
   1,036.80x = 1,552.32 × 522.72
4. Step 4: Simplify right side
   1,036.80x = 811,428.71
5. Step 5: Solve for x
   x = 811,428.71/1,036.80
6. Step 6: Final answer
   x = 782.63