Finding the Fourth Proportional to 2,113.47, 3,165.60 and 1,188.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,113.47 : 3,165.60 = 1,188.54 : x
2. Step 2: Convert to fraction form
   2,113.47/3,165.60 = 1,188.54/x
3. Step 3: Cross multiply
   2,113.47x = 3,165.60 × 1,188.54
4. Step 4: Simplify right side
   2,113.47x = 3,762,442.22
5. Step 5: Solve for x
   x = 3,762,442.22/2,113.47
6. Step 6: Final answer
   x = 1,780.22