Finding the Fourth Proportional to 1,510.08, 2,263.68 and 780.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,510.08 : 2,263.68 = 780.72 : x
2. Step 2: Convert to fraction form
   1,510.08/2,263.68 = 780.72/x
3. Step 3: Cross multiply
   1,510.08x = 2,263.68 × 780.72
4. Step 4: Simplify right side
   1,510.08x = 1,767,300.25
5. Step 5: Solve for x
   x = 1,767,300.25/1,510.08
6. Step 6: Final answer
   x = 1,170.34