Finding the Fourth Proportional to 10,091.56, 15,136.72 and 4,830.31

Step by Step Solution

1. Step 1: Write the proportion equation
   10,091.56 : 15,136.72 = 4,830.31 : x
2. Step 2: Convert to fraction form
   10,091.56/15,136.72 = 4,830.31/x
3. Step 3: Cross multiply
   10,091.56x = 15,136.72 × 4,830.31
4. Step 4: Simplify right side
   10,091.56x = 73,115,049.98
5. Step 5: Solve for x
   x = 73,115,049.98/10,091.56
6. Step 6: Final answer
   x = 7,245.17