Finding the Fourth Proportional to 9,888.95, 13,646.48 and 5,412.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,888.95 : 13,646.48 = 5,412.42 : x
2. Step 2: Convert to fraction form
   9,888.95/13,646.48 = 5,412.42/x
3. Step 3: Cross multiply
   9,888.95x = 13,646.48 × 5,412.42
4. Step 4: Simplify right side
   9,888.95x = 73,860,454.22
5. Step 5: Solve for x
   x = 73,860,454.22/9,888.95
6. Step 6: Final answer
   x = 7,468.99