Finding the Fourth Proportional to 16,631.30, 23,322.70 and 16,631.30

Step by Step Solution

1. Step 1: Write the proportion equation
   16,631.30 : 23,322.70 = 16,631.30 : x
2. Step 2: Convert to fraction form
   16,631.30/23,322.70 = 16,631.30/x
3. Step 3: Cross multiply
   16,631.30x = 23,322.70 × 16,631.30
4. Step 4: Simplify right side
   16,631.30x = 387,886,820.51
5. Step 5: Solve for x
   x = 387,886,820.51/16,631.30
6. Step 6: Final answer
   x = 23,322.70