Finding the Fourth Proportional to 1,012.32, 1,521.32 and 987.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012.32 : 1,521.32 = 987.75 : x
2. Step 2: Convert to fraction form
   1,012.32/1,521.32 = 987.75/x
3. Step 3: Cross multiply
   1,012.32x = 1,521.32 × 987.75
4. Step 4: Simplify right side
   1,012.32x = 1,502,678.89
5. Step 5: Solve for x
   x = 1,502,678.89/1,012.32
6. Step 6: Final answer
   x = 1,484.39