Finding the Fourth Proportional to 9,886.10, 13,642.82 and 5,409.86

Step by Step Solution

1. Step 1: Write the proportion equation
   9,886.10 : 13,642.82 = 5,409.86 : x
2. Step 2: Convert to fraction form
   9,886.10/13,642.82 = 5,409.86/x
3. Step 3: Cross multiply
   9,886.10x = 13,642.82 × 5,409.86
4. Step 4: Simplify right side
   9,886.10x = 73,805,691.52
5. Step 5: Solve for x
   x = 73,805,691.52/9,886.10
6. Step 6: Final answer
   x = 7,465.60