Finding the Fourth Proportional to 5,185.72, 7,109.76 and 5,092.40

Step by Step Solution

1. Step 1: Write the proportion equation
   5,185.72 : 7,109.76 = 5,092.40 : x
2. Step 2: Convert to fraction form
   5,185.72/7,109.76 = 5,092.40/x
3. Step 3: Cross multiply
   5,185.72x = 7,109.76 × 5,092.40
4. Step 4: Simplify right side
   5,185.72x = 36,205,741.82
5. Step 5: Solve for x
   x = 36,205,741.82/5,185.72
6. Step 6: Final answer
   x = 6,981.82