Finding the Fourth Proportional to 2,670.71, 4,005.05 and 1,283.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,670.71 : 4,005.05 = 1,283.72 : x
2. Step 2: Convert to fraction form
   2,670.71/4,005.05 = 1,283.72/x
3. Step 3: Cross multiply
   2,670.71x = 4,005.05 × 1,283.72
4. Step 4: Simplify right side
   2,670.71x = 5,141,336.34
5. Step 5: Solve for x
   x = 5,141,336.34/2,670.71
6. Step 6: Final answer
   x = 1,925.09