Finding the Fourth Proportional to 2,100.63, 3,151.44 and 1,485.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.63 : 3,151.44 = 1,485.57 : x
2. Step 2: Convert to fraction form
   2,100.63/3,151.44 = 1,485.57/x
3. Step 3: Cross multiply
   2,100.63x = 3,151.44 × 1,485.57
4. Step 4: Simplify right side
   2,100.63x = 4,681,684.72
5. Step 5: Solve for x
   x = 4,681,684.72/2,100.63
6. Step 6: Final answer
   x = 2,228.71