Finding the Fourth Proportional to 2,191.63, 3,025.14 and 1,528.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,191.63 : 3,025.14 = 1,528.72 : x
2. Step 2: Convert to fraction form
   2,191.63/3,025.14 = 1,528.72/x
3. Step 3: Cross multiply
   2,191.63x = 3,025.14 × 1,528.72
4. Step 4: Simplify right side
   2,191.63x = 4,624,592.02
5. Step 5: Solve for x
   x = 4,624,592.02/2,191.63
6. Step 6: Final answer
   x = 2,110.12