Finding the Fourth Proportional to 9,888.61, 13,646.04 and 5,412.35

Step by Step Solution

1. Step 1: Write the proportion equation
   9,888.61 : 13,646.04 = 5,412.35 : x
2. Step 2: Convert to fraction form
   9,888.61/13,646.04 = 5,412.35/x
3. Step 3: Cross multiply
   9,888.61x = 13,646.04 × 5,412.35
4. Step 4: Simplify right side
   9,888.61x = 73,857,144.59
5. Step 5: Solve for x
   x = 73,857,144.59/9,888.61
6. Step 6: Final answer
   x = 7,468.91