Finding the Fourth Proportional to 1,541.03, 2,312.31 and 719.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,541.03 : 2,312.31 = 719.89 : x
2. Step 2: Convert to fraction form
   1,541.03/2,312.31 = 719.89/x
3. Step 3: Cross multiply
   1,541.03x = 2,312.31 × 719.89
4. Step 4: Simplify right side
   1,541.03x = 1,664,618.77
5. Step 5: Solve for x
   x = 1,664,618.77/1,541.03
6. Step 6: Final answer
   x = 1,080.20