Finding the Fourth Proportional to 12,931.18, 19,379.86 and 5,810.06

Step by Step Solution

1. Step 1: Write the proportion equation
   12,931.18 : 19,379.86 = 5,810.06 : x
2. Step 2: Convert to fraction form
   12,931.18/19,379.86 = 5,810.06/x
3. Step 3: Cross multiply
   12,931.18x = 19,379.86 × 5,810.06
4. Step 4: Simplify right side
   12,931.18x = 112,598,183.32
5. Step 5: Solve for x
   x = 112,598,183.32/12,931.18
6. Step 6: Final answer
   x = 8,707.50