Finding the Fourth Proportional to 9,918.10, 13,686.52 and 5,441.74

Step by Step Solution

1. Step 1: Write the proportion equation
   9,918.10 : 13,686.52 = 5,441.74 : x
2. Step 2: Convert to fraction form
   9,918.10/13,686.52 = 5,441.74/x
3. Step 3: Cross multiply
   9,918.10x = 13,686.52 × 5,441.74
4. Step 4: Simplify right side
   9,918.10x = 74,478,483.34
5. Step 5: Solve for x
   x = 74,478,483.34/9,918.10
6. Step 6: Final answer
   x = 7,509.35