Finding the Fourth Proportional to 2,538.08, 3,806.51 and 872.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,538.08 : 3,806.51 = 872.01 : x
2. Step 2: Convert to fraction form
   2,538.08/3,806.51 = 872.01/x
3. Step 3: Cross multiply
   2,538.08x = 3,806.51 × 872.01
4. Step 4: Simplify right side
   2,538.08x = 3,319,300.91
5. Step 5: Solve for x
   x = 3,319,300.91/2,538.08
6. Step 6: Final answer
   x = 1,307.80