Finding the Fourth Proportional to 1,602.10, 2,209.71 and 1,012.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,602.10 : 2,209.71 = 1,012.51 : x
2. Step 2: Convert to fraction form
   1,602.10/2,209.71 = 1,012.51/x
3. Step 3: Cross multiply
   1,602.10x = 2,209.71 × 1,012.51
4. Step 4: Simplify right side
   1,602.10x = 2,237,353.47
5. Step 5: Solve for x
   x = 2,237,353.47/1,602.10
6. Step 6: Final answer
   x = 1,396.51