Finding the Fourth Proportional to 1,339.72, 1,848.90 and 1,161.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,339.72 : 1,848.90 = 1,161.34 : x
2. Step 2: Convert to fraction form
   1,339.72/1,848.90 = 1,161.34/x
3. Step 3: Cross multiply
   1,339.72x = 1,848.90 × 1,161.34
4. Step 4: Simplify right side
   1,339.72x = 2,147,201.53
5. Step 5: Solve for x
   x = 2,147,201.53/1,339.72
6. Step 6: Final answer
   x = 1,602.72