Finding the Fourth Proportional to 1,385.67, 2,077.48 and 837.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.67 : 2,077.48 = 837.72 : x
2. Step 2: Convert to fraction form
   1,385.67/2,077.48 = 837.72/x
3. Step 3: Cross multiply
   1,385.67x = 2,077.48 × 837.72
4. Step 4: Simplify right side
   1,385.67x = 1,740,347.59
5. Step 5: Solve for x
   x = 1,740,347.59/1,385.67
6. Step 6: Final answer
   x = 1,255.96