Finding the Fourth Proportional to 37,758, 52,106.22 and 20,991

Step by Step Solution

1. Step 1: Write the proportion equation
   37,758 : 52,106.22 = 20,991 : x
2. Step 2: Convert to fraction form
   37,758/52,106.22 = 20,991/x
3. Step 3: Cross multiply
   37,758x = 52,106.22 × 20,991
4. Step 4: Simplify right side
   37,758x = 1,093,761,664.02
5. Step 5: Solve for x
   x = 1,093,761,664.02/37,758
6. Step 6: Final answer
   x = 28,967.68