Finding the Fourth Proportional to 2,113.32, 2,917.15 and 1,590.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,113.32 : 2,917.15 = 1,590.86 : x
2. Step 2: Convert to fraction form
   2,113.32/2,917.15 = 1,590.86/x
3. Step 3: Cross multiply
   2,113.32x = 2,917.15 × 1,590.86
4. Step 4: Simplify right side
   2,113.32x = 4,640,777.25
5. Step 5: Solve for x
   x = 4,640,777.25/2,113.32
6. Step 6: Final answer
   x = 2,195.97