Finding the Fourth Proportional to 1,968.01, 2,715.83 and 1,212.13

Step by Step Solution

1. Step 1: Write the proportion equation
   1,968.01 : 2,715.83 = 1,212.13 : x
2. Step 2: Convert to fraction form
   1,968.01/2,715.83 = 1,212.13/x
3. Step 3: Cross multiply
   1,968.01x = 2,715.83 × 1,212.13
4. Step 4: Simplify right side
   1,968.01x = 3,291,940.90
5. Step 5: Solve for x
   x = 3,291,940.90/1,968.01
6. Step 6: Final answer
   x = 1,672.72