Finding the Fourth Proportional to 9,912.22, 13,678.88 and 5,436.01

Step by Step Solution

1. Step 1: Write the proportion equation
   9,912.22 : 13,678.88 = 5,436.01 : x
2. Step 2: Convert to fraction form
   9,912.22/13,678.88 = 5,436.01/x
3. Step 3: Cross multiply
   9,912.22x = 13,678.88 × 5,436.01
4. Step 4: Simplify right side
   9,912.22x = 74,358,473.66
5. Step 5: Solve for x
   x = 74,358,473.66/9,912.22
6. Step 6: Final answer
   x = 7,501.70