Finding the Fourth Proportional to 2,653.32, 3,978.70 and 1,112.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,653.32 : 3,978.70 = 1,112.84 : x
2. Step 2: Convert to fraction form
   2,653.32/3,978.70 = 1,112.84/x
3. Step 3: Cross multiply
   2,653.32x = 3,978.70 × 1,112.84
4. Step 4: Simplify right side
   2,653.32x = 4,427,656.51
5. Step 5: Solve for x
   x = 4,427,656.51/2,653.32
6. Step 6: Final answer
   x = 1,668.72