Finding the Fourth Proportional to 1,337.72, 2,015.72 and 1,099.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,337.72 : 2,015.72 = 1,099.58 : x
2. Step 2: Convert to fraction form
   1,337.72/2,015.72 = 1,099.58/x
3. Step 3: Cross multiply
   1,337.72x = 2,015.72 × 1,099.58
4. Step 4: Simplify right side
   1,337.72x = 2,216,444.94
5. Step 5: Solve for x
   x = 2,216,444.94/1,337.72
6. Step 6: Final answer
   x = 1,656.88