Finding the Fourth Proportional to 1,520.87, 2,092.52 and 1,188.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,520.87 : 2,092.52 = 1,188.72 : x
2. Step 2: Convert to fraction form
   1,520.87/2,092.52 = 1,188.72/x
3. Step 3: Cross multiply
   1,520.87x = 2,092.52 × 1,188.72
4. Step 4: Simplify right side
   1,520.87x = 2,487,423.35
5. Step 5: Solve for x
   x = 2,487,423.35/1,520.87
6. Step 6: Final answer
   x = 1,635.53