Finding the Fourth Proportional to 2,058.72, 3,068.52 and 1,991.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,058.72 : 3,068.52 = 1,991.22 : x
2. Step 2: Convert to fraction form
   2,058.72/3,068.52 = 1,991.22/x
3. Step 3: Cross multiply
   2,058.72x = 3,068.52 × 1,991.22
4. Step 4: Simplify right side
   2,058.72x = 6,110,098.39
5. Step 5: Solve for x
   x = 6,110,098.39/2,058.72
6. Step 6: Final answer
   x = 2,967.91