Finding the Fourth Proportional to 2,117.50, 2,922.78 and 1,488.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,117.50 : 2,922.78 = 1,488.21 : x
2. Step 2: Convert to fraction form
   2,117.50/2,922.78 = 1,488.21/x
3. Step 3: Cross multiply
   2,117.50x = 2,922.78 × 1,488.21
4. Step 4: Simplify right side
   2,117.50x = 4,349,710.42
5. Step 5: Solve for x
   x = 4,349,710.42/2,117.50
6. Step 6: Final answer
   x = 2,054.17