Finding the Fourth Proportional to 9,379.73, 12,943.98 and 5,187.98

Step by Step Solution

1. Step 1: Write the proportion equation
   9,379.73 : 12,943.98 = 5,187.98 : x
2. Step 2: Convert to fraction form
   9,379.73/12,943.98 = 5,187.98/x
3. Step 3: Cross multiply
   9,379.73x = 12,943.98 × 5,187.98
4. Step 4: Simplify right side
   9,379.73x = 67,153,109.36
5. Step 5: Solve for x
   x = 67,153,109.36/9,379.73
6. Step 6: Final answer
   x = 7,159.39