Finding the Fourth Proportional to 1,675.33, 2,312.12 and 1,012.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,675.33 : 2,312.12 = 1,012.72 : x
2. Step 2: Convert to fraction form
   1,675.33/2,312.12 = 1,012.72/x
3. Step 3: Cross multiply
   1,675.33x = 2,312.12 × 1,012.72
4. Step 4: Simplify right side
   1,675.33x = 2,341,525.10
5. Step 5: Solve for x
   x = 2,341,525.10/1,675.33
6. Step 6: Final answer
   x = 1,397.65