Finding the Fourth Proportional to 2,672.04, 4,005.42 and 1,111.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,672.04 : 4,005.42 = 1,111.80 : x
2. Step 2: Convert to fraction form
   2,672.04/4,005.42 = 1,111.80/x
3. Step 3: Cross multiply
   2,672.04x = 4,005.42 × 1,111.80
4. Step 4: Simplify right side
   2,672.04x = 4,453,225.96
5. Step 5: Solve for x
   x = 4,453,225.96/2,672.04
6. Step 6: Final answer
   x = 1,666.60