Finding the Fourth Proportional to 1,435.02, 2,155.63 and 1,216.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.02 : 2,155.63 = 1,216.10 : x
2. Step 2: Convert to fraction form
   1,435.02/2,155.63 = 1,216.10/x
3. Step 3: Cross multiply
   1,435.02x = 2,155.63 × 1,216.10
4. Step 4: Simplify right side
   1,435.02x = 2,621,461.64
5. Step 5: Solve for x
   x = 2,621,461.64/1,435.02
6. Step 6: Final answer
   x = 1,826.78