Finding the Fourth Proportional to 1,380.15, 2,068.38 and 1,233.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380.15 : 2,068.38 = 1,233.72 : x
2. Step 2: Convert to fraction form
   1,380.15/2,068.38 = 1,233.72/x
3. Step 3: Cross multiply
   1,380.15x = 2,068.38 × 1,233.72
4. Step 4: Simplify right side
   1,380.15x = 2,551,801.77
5. Step 5: Solve for x
   x = 2,551,801.77/1,380.15
6. Step 6: Final answer
   x = 1,848.93