Finding the Fourth Proportional to 1,535.30, 2,106.93 and 1,438.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,535.30 : 2,106.93 = 1,438.10 : x
2. Step 2: Convert to fraction form
   1,535.30/2,106.93 = 1,438.10/x
3. Step 3: Cross multiply
   1,535.30x = 2,106.93 × 1,438.10
4. Step 4: Simplify right side
   1,535.30x = 3,029,976.03
5. Step 5: Solve for x
   x = 3,029,976.03/1,535.30
6. Step 6: Final answer
   x = 1,973.54