Finding the Fourth Proportional to 9,415.32, 12,993.12 and 5,436.33

Step by Step Solution

1. Step 1: Write the proportion equation
   9,415.32 : 12,993.12 = 5,436.33 : x
2. Step 2: Convert to fraction form
   9,415.32/12,993.12 = 5,436.33/x
3. Step 3: Cross multiply
   9,415.32x = 12,993.12 × 5,436.33
4. Step 4: Simplify right side
   9,415.32x = 70,634,888.05
5. Step 5: Solve for x
   x = 70,634,888.05/9,415.32
6. Step 6: Final answer
   x = 7,502.12