Finding the Fourth Proportional to 9,870.08, 13,620.12 and 5,393.86

Step by Step Solution

1. Step 1: Write the proportion equation
   9,870.08 : 13,620.12 = 5,393.86 : x
2. Step 2: Convert to fraction form
   9,870.08/13,620.12 = 5,393.86/x
3. Step 3: Cross multiply
   9,870.08x = 13,620.12 × 5,393.86
4. Step 4: Simplify right side
   9,870.08x = 73,465,020.46
5. Step 5: Solve for x
   x = 73,465,020.46/9,870.08
6. Step 6: Final answer
   x = 7,443.21