Finding the Fourth Proportional to 1,811.47, 2,499.72 and 1,003.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,811.47 : 2,499.72 = 1,003.77 : x
2. Step 2: Convert to fraction form
   1,811.47/2,499.72 = 1,003.77/x
3. Step 3: Cross multiply
   1,811.47x = 2,499.72 × 1,003.77
4. Step 4: Simplify right side
   1,811.47x = 2,509,143.94
5. Step 5: Solve for x
   x = 2,509,143.94/1,811.47
6. Step 6: Final answer
   x = 1,385.14