Finding the Fourth Proportional to 2,111.63, 3,164.56 and 1,138.19

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.63 : 3,164.56 = 1,138.19 : x
2. Step 2: Convert to fraction form
   2,111.63/3,164.56 = 1,138.19/x
3. Step 3: Cross multiply
   2,111.63x = 3,164.56 × 1,138.19
4. Step 4: Simplify right side
   2,111.63x = 3,601,851.88
5. Step 5: Solve for x
   x = 3,601,851.88/2,111.63
6. Step 6: Final answer
   x = 1,705.73