Finding the Fourth Proportional to 1,420.56, 2,138.37 and 1,012.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,420.56 : 2,138.37 = 1,012.52 : x
2. Step 2: Convert to fraction form
   1,420.56/2,138.37 = 1,012.52/x
3. Step 3: Cross multiply
   1,420.56x = 2,138.37 × 1,012.52
4. Step 4: Simplify right side
   1,420.56x = 2,165,142.39
5. Step 5: Solve for x
   x = 2,165,142.39/1,420.56
6. Step 6: Final answer
   x = 1,524.15