Finding the Fourth Proportional to 1,485.83, 2,213.05 and 1,407.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,485.83 : 2,213.05 = 1,407.77 : x
2. Step 2: Convert to fraction form
   1,485.83/2,213.05 = 1,407.77/x
3. Step 3: Cross multiply
   1,485.83x = 2,213.05 × 1,407.77
4. Step 4: Simplify right side
   1,485.83x = 3,115,454.33
5. Step 5: Solve for x
   x = 3,115,454.33/1,485.83
6. Step 6: Final answer
   x = 2,096.78