Finding the Fourth Proportional to 56,322.45, 77,723.82 and 30,828.20

Step by Step Solution

1. Step 1: Write the proportion equation
   56,322.45 : 77,723.82 = 30,828.20 : x
2. Step 2: Convert to fraction form
   56,322.45/77,723.82 = 30,828.20/x
3. Step 3: Cross multiply
   56,322.45x = 77,723.82 × 30,828.20
4. Step 4: Simplify right side
   56,322.45x = 2,396,085,079.10
5. Step 5: Solve for x
   x = 2,396,085,079.10/56,322.45
6. Step 6: Final answer
   x = 42,542.27