Finding the Fourth Proportional to 1,368.72, 2,051.46 and 719.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,368.72 : 2,051.46 = 719.10 : x
2. Step 2: Convert to fraction form
   1,368.72/2,051.46 = 719.10/x
3. Step 3: Cross multiply
   1,368.72x = 2,051.46 × 719.10
4. Step 4: Simplify right side
   1,368.72x = 1,475,204.89
5. Step 5: Solve for x
   x = 1,475,204.89/1,368.72
6. Step 6: Final answer
   x = 1,077.80