Finding the Fourth Proportional to 1,362.10, 1,875.72 and 1,213.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,362.10 : 1,875.72 = 1,213.06 : x
2. Step 2: Convert to fraction form
   1,362.10/1,875.72 = 1,213.06/x
3. Step 3: Cross multiply
   1,362.10x = 1,875.72 × 1,213.06
4. Step 4: Simplify right side
   1,362.10x = 2,275,360.90
5. Step 5: Solve for x
   x = 2,275,360.90/1,362.10
6. Step 6: Final answer
   x = 1,670.48