Finding the Fourth Proportional to 2,119.40, 2,925.60 and 1,530.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,119.40 : 2,925.60 = 1,530.72 : x
2. Step 2: Convert to fraction form
   2,119.40/2,925.60 = 1,530.72/x
3. Step 3: Cross multiply
   2,119.40x = 2,925.60 × 1,530.72
4. Step 4: Simplify right side
   2,119.40x = 4,478,274.43
5. Step 5: Solve for x
   x = 4,478,274.43/2,119.40
6. Step 6: Final answer
   x = 2,112.99