Finding the Fourth Proportional to 2,816.19, 3,887.46 and 2,031.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,816.19 : 3,887.46 = 2,031.30 : x
2. Step 2: Convert to fraction form
   2,816.19/3,887.46 = 2,031.30/x
3. Step 3: Cross multiply
   2,816.19x = 3,887.46 × 2,031.30
4. Step 4: Simplify right side
   2,816.19x = 7,896,597.50
5. Step 5: Solve for x
   x = 7,896,597.50/2,816.19
6. Step 6: Final answer
   x = 2,804.00