Finding the Fourth Proportional to 1,642.50, 2,251.86 and 1,612.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,642.50 : 2,251.86 = 1,612.94 : x
2. Step 2: Convert to fraction form
   1,642.50/2,251.86 = 1,612.94/x
3. Step 3: Cross multiply
   1,642.50x = 2,251.86 × 1,612.94
4. Step 4: Simplify right side
   1,642.50x = 3,632,103.81
5. Step 5: Solve for x
   x = 3,632,103.81/1,642.50
6. Step 6: Final answer
   x = 2,211.33