Finding the Fourth Proportional to 1,262.76, 1,893.39 and 522.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,262.76 : 1,893.39 = 522.15 : x
2. Step 2: Convert to fraction form
   1,262.76/1,893.39 = 522.15/x
3. Step 3: Cross multiply
   1,262.76x = 1,893.39 × 522.15
4. Step 4: Simplify right side
   1,262.76x = 988,633.59
5. Step 5: Solve for x
   x = 988,633.59/1,262.76
6. Step 6: Final answer
   x = 782.91