Finding the Fourth Proportional to 2,803.15, 3,870.93 and 1,810.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,803.15 : 3,870.93 = 1,810.12 : x
2. Step 2: Convert to fraction form
   2,803.15/3,870.93 = 1,810.12/x
3. Step 3: Cross multiply
   2,803.15x = 3,870.93 × 1,810.12
4. Step 4: Simplify right side
   2,803.15x = 7,006,847.81
5. Step 5: Solve for x
   x = 7,006,847.81/2,803.15
6. Step 6: Final answer
   x = 2,499.63