Finding the Fourth Proportional to 1,012.50, 1,519.56 and 525.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012.50 : 1,519.56 = 525.69 : x
2. Step 2: Convert to fraction form
   1,012.50/1,519.56 = 525.69/x
3. Step 3: Cross multiply
   1,012.50x = 1,519.56 × 525.69
4. Step 4: Simplify right side
   1,012.50x = 798,817.50
5. Step 5: Solve for x
   x = 798,817.50/1,012.50
6. Step 6: Final answer
   x = 788.96