Finding the Fourth Proportional to 2,111.90, 3,167.91 and 651.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.90 : 3,167.91 = 651.08 : x
2. Step 2: Convert to fraction form
   2,111.90/3,167.91 = 651.08/x
3. Step 3: Cross multiply
   2,111.90x = 3,167.91 × 651.08
4. Step 4: Simplify right side
   2,111.90x = 2,062,562.84
5. Step 5: Solve for x
   x = 2,062,562.84/2,111.90
6. Step 6: Final answer
   x = 976.64