Finding the Fourth Proportional to 9,415.89, 12,993.35 and 5,436.36

Step by Step Solution

1. Step 1: Write the proportion equation
   9,415.89 : 12,993.35 = 5,436.36 : x
2. Step 2: Convert to fraction form
   9,415.89/12,993.35 = 5,436.36/x
3. Step 3: Cross multiply
   9,415.89x = 12,993.35 × 5,436.36
4. Step 4: Simplify right side
   9,415.89x = 70,636,501.02
5. Step 5: Solve for x
   x = 70,636,501.02/9,415.89
6. Step 6: Final answer
   x = 7,501.84