Finding the Fourth Proportional to 81,164.64, 112,078.56 and 51,002.40

Step by Step Solution

1. Step 1: Write the proportion equation
   81,164.64 : 112,078.56 = 51,002.40 : x
2. Step 2: Convert to fraction form
   81,164.64/112,078.56 = 51,002.40/x
3. Step 3: Cross multiply
   81,164.64x = 112,078.56 × 51,002.40
4. Step 4: Simplify right side
   81,164.64x = 5,716,275,548.54
5. Step 5: Solve for x
   x = 5,716,275,548.54/81,164.64
6. Step 6: Final answer
   x = 70,428.15