Finding the Fourth Proportional to 1,535.22, 2,300.76 and 987.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,535.22 : 2,300.76 = 987.12 : x
2. Step 2: Convert to fraction form
   1,535.22/2,300.76 = 987.12/x
3. Step 3: Cross multiply
   1,535.22x = 2,300.76 × 987.12
4. Step 4: Simplify right side
   1,535.22x = 2,271,126.21
5. Step 5: Solve for x
   x = 2,271,126.21/1,535.22
6. Step 6: Final answer
   x = 1,479.35