Finding the Fourth Proportional to 21,618,968.32, 32,428,828.32 and 7,965,086.68

Step by Step Solution

1. Step 1: Write the proportion equation
   21,618,968.32 : 32,428,828.32 = 7,965,086.68 : x
2. Step 2: Convert to fraction form
   21,618,968.32/32,428,828.32 = 7,965,086.68/x
3. Step 3: Cross multiply
   21,618,968.32x = 32,428,828.32 × 7,965,086.68
4. Step 4: Simplify right side
   21,618,968.32x = 258,298,428,499,638.78
5. Step 5: Solve for x
   x = 258,298,428,499,638.78/21,618,968.32
6. Step 6: Final answer
   x = 11,947,768.49