Finding the Fourth Proportional to 1,528.18, 2,106.89 and 1,507.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,528.18 : 2,106.89 = 1,507.52 : x
2. Step 2: Convert to fraction form
   1,528.18/2,106.89 = 1,507.52/x
3. Step 3: Cross multiply
   1,528.18x = 2,106.89 × 1,507.52
4. Step 4: Simplify right side
   1,528.18x = 3,176,178.81
5. Step 5: Solve for x
   x = 3,176,178.81/1,528.18
6. Step 6: Final answer
   x = 2,078.41