Finding the Fourth Proportional to 1,377.61, 1,902.76 and 1,004.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.61 : 1,902.76 = 1,004.00 : x
2. Step 2: Convert to fraction form
   1,377.61/1,902.76 = 1,004.00/x
3. Step 3: Cross multiply
   1,377.61x = 1,902.76 × 1,004.00
4. Step 4: Simplify right side
   1,377.61x = 1,910,359.02
5. Step 5: Solve for x
   x = 1,910,359.02/1,377.61
6. Step 6: Final answer
   x = 1,386.72