Finding the Fourth Proportional to 1,008.72, 1,521.84 and 1,006.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,008.72 : 1,521.84 = 1,006.02 : x
2. Step 2: Convert to fraction form
   1,008.72/1,521.84 = 1,006.02/x
3. Step 3: Cross multiply
   1,008.72x = 1,521.84 × 1,006.02
4. Step 4: Simplify right side
   1,008.72x = 1,531,001.48
5. Step 5: Solve for x
   x = 1,531,001.48/1,008.72
6. Step 6: Final answer
   x = 1,517.77