Finding the Fourth Proportional to 1,885.04, 2,821.72 and 1,392.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,885.04 : 2,821.72 = 1,392.01 : x
2. Step 2: Convert to fraction form
   1,885.04/2,821.72 = 1,392.01/x
3. Step 3: Cross multiply
   1,885.04x = 2,821.72 × 1,392.01
4. Step 4: Simplify right side
   1,885.04x = 3,927,862.46
5. Step 5: Solve for x
   x = 3,927,862.46/1,885.04
6. Step 6: Final answer
   x = 2,083.70