Finding the Fourth Proportional to 9,379.51, 12,943.56 and 5,187.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,379.51 : 12,943.56 = 5,187.76 : x
2. Step 2: Convert to fraction form
   9,379.51/12,943.56 = 5,187.76/x
3. Step 3: Cross multiply
   9,379.51x = 12,943.56 × 5,187.76
4. Step 4: Simplify right side
   9,379.51x = 67,148,069.92
5. Step 5: Solve for x
   x = 67,148,069.92/9,379.51
6. Step 6: Final answer
   x = 7,159.02