Finding the Fourth Proportional to 10,113.34, 15,173.61 and 5,185.30

Step by Step Solution

1. Step 1: Write the proportion equation
   10,113.34 : 15,173.61 = 5,185.30 : x
2. Step 2: Convert to fraction form
   10,113.34/15,173.61 = 5,185.30/x
3. Step 3: Cross multiply
   10,113.34x = 15,173.61 × 5,185.30
4. Step 4: Simplify right side
   10,113.34x = 78,679,719.93
5. Step 5: Solve for x
   x = 78,679,719.93/10,113.34
6. Step 6: Final answer
   x = 7,779.80