Finding the Fourth Proportional to 10,356.59, 15,523.70 and 5,085.47

Step by Step Solution

1. Step 1: Write the proportion equation
   10,356.59 : 15,523.70 = 5,085.47 : x
2. Step 2: Convert to fraction form
   10,356.59/15,523.70 = 5,085.47/x
3. Step 3: Cross multiply
   10,356.59x = 15,523.70 × 5,085.47
4. Step 4: Simplify right side
   10,356.59x = 78,945,233.02
5. Step 5: Solve for x
   x = 78,945,233.02/10,356.59
6. Step 6: Final answer
   x = 7,622.71