Finding the Fourth Proportional to 2,521.16, 3,478.89 and 1,526.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,521.16 : 3,478.89 = 1,526.90 : x
2. Step 2: Convert to fraction form
   2,521.16/3,478.89 = 1,526.90/x
3. Step 3: Cross multiply
   2,521.16x = 3,478.89 × 1,526.90
4. Step 4: Simplify right side
   2,521.16x = 5,311,917.14
5. Step 5: Solve for x
   x = 5,311,917.14/2,521.16
6. Step 6: Final answer
   x = 2,106.93