Finding the Fourth Proportional to 3,730.95, 5,586.71 and 1,991.07

Step by Step Solution

1. Step 1: Write the proportion equation
   3,730.95 : 5,586.71 = 1,991.07 : x
2. Step 2: Convert to fraction form
   3,730.95/5,586.71 = 1,991.07/x
3. Step 3: Cross multiply
   3,730.95x = 5,586.71 × 1,991.07
4. Step 4: Simplify right side
   3,730.95x = 11,123,520.72
5. Step 5: Solve for x
   x = 11,123,520.72/3,730.95
6. Step 6: Final answer
   x = 2,981.42