Finding the Fourth Proportional to 2,670.17, 4,005.72 and 1,189.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,670.17 : 4,005.72 = 1,189.92 : x
2. Step 2: Convert to fraction form
   2,670.17/4,005.72 = 1,189.92/x
3. Step 3: Cross multiply
   2,670.17x = 4,005.72 × 1,189.92
4. Step 4: Simplify right side
   2,670.17x = 4,766,486.34
5. Step 5: Solve for x
   x = 4,766,486.34/2,670.17
6. Step 6: Final answer
   x = 1,785.09