Finding the Fourth Proportional to 2,670.72, 4,004.16 and 1,209.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,670.72 : 4,004.16 = 1,209.12 : x
2. Step 2: Convert to fraction form
   2,670.72/4,004.16 = 1,209.12/x
3. Step 3: Cross multiply
   2,670.72x = 4,004.16 × 1,209.12
4. Step 4: Simplify right side
   2,670.72x = 4,841,509.94
5. Step 5: Solve for x
   x = 4,841,509.94/2,670.72
6. Step 6: Final answer
   x = 1,812.81