Finding the Fourth Proportional to 72,464.64, 108,678.72 and 28,076.16

Step by Step Solution

1. Step 1: Write the proportion equation
   72,464.64 : 108,678.72 = 28,076.16 : x
2. Step 2: Convert to fraction form
   72,464.64/108,678.72 = 28,076.16/x
3. Step 3: Cross multiply
   72,464.64x = 108,678.72 × 28,076.16
4. Step 4: Simplify right side
   72,464.64x = 3,051,281,131.32
5. Step 5: Solve for x
   x = 3,051,281,131.32/72,464.64
6. Step 6: Final answer
   x = 42,107.17