Finding the Fourth Proportional to 9,377.02, 12,939.78 and 5,185

Step by Step Solution

1. Step 1: Write the proportion equation
   9,377.02 : 12,939.78 = 5,185 : x
2. Step 2: Convert to fraction form
   9,377.02/12,939.78 = 5,185/x
3. Step 3: Cross multiply
   9,377.02x = 12,939.78 × 5,185
4. Step 4: Simplify right side
   9,377.02x = 67,092,759.30
5. Step 5: Solve for x
   x = 67,092,759.30/9,377.02
6. Step 6: Final answer
   x = 7,155.02