Finding the Fourth Proportional to 20,741.35, 31,112.14 and 5,158.98

Step by Step Solution

1. Step 1: Write the proportion equation
   20,741.35 : 31,112.14 = 5,158.98 : x
2. Step 2: Convert to fraction form
   20,741.35/31,112.14 = 5,158.98/x
3. Step 3: Cross multiply
   20,741.35x = 31,112.14 × 5,158.98
4. Step 4: Simplify right side
   20,741.35x = 160,506,908.02
5. Step 5: Solve for x
   x = 160,506,908.02/20,741.35
6. Step 6: Final answer
   x = 7,738.50