Finding the Fourth Proportional to 2,919.47, 4,381.03 and 1,188.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,919.47 : 4,381.03 = 1,188.09 : x
2. Step 2: Convert to fraction form
   2,919.47/4,381.03 = 1,188.09/x
3. Step 3: Cross multiply
   2,919.47x = 4,381.03 × 1,188.09
4. Step 4: Simplify right side
   2,919.47x = 5,205,071.39
5. Step 5: Solve for x
   x = 5,205,071.39/2,919.47
6. Step 6: Final answer
   x = 1,782.88