Finding the Fourth Proportional to 8,436,236.16, 12,648,990.72 and 7,157,284.32

Step by Step Solution

1. Step 1: Write the proportion equation
   8,436,236.16 : 12,648,990.72 = 7,157,284.32 : x
2. Step 2: Convert to fraction form
   8,436,236.16/12,648,990.72 = 7,157,284.32/x
3. Step 3: Cross multiply
   8,436,236.16x = 12,648,990.72 × 7,157,284.32
4. Step 4: Simplify right side
   8,436,236.16x = 90,532,422,944,081.52
5. Step 5: Solve for x
   x = 90,532,422,944,081.52/8,436,236.16
6. Step 6: Final answer
   x = 10,731,376.08