Finding the Fourth Proportional to 1,012.50, 1,510.92 and 903.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012.50 : 1,510.92 = 903.15 : x
2. Step 2: Convert to fraction form
   1,012.50/1,510.92 = 903.15/x
3. Step 3: Cross multiply
   1,012.50x = 1,510.92 × 903.15
4. Step 4: Simplify right side
   1,012.50x = 1,364,587.40
5. Step 5: Solve for x
   x = 1,364,587.40/1,012.50
6. Step 6: Final answer
   x = 1,347.74