Finding the Fourth Proportional to 56,388.26, 77,815.78 and 30,896.25

Step by Step Solution

1. Step 1: Write the proportion equation
   56,388.26 : 77,815.78 = 30,896.25 : x
2. Step 2: Convert to fraction form
   56,388.26/77,815.78 = 30,896.25/x
3. Step 3: Cross multiply
   56,388.26x = 77,815.78 × 30,896.25
4. Step 4: Simplify right side
   56,388.26x = 2,404,215,792.83
5. Step 5: Solve for x
   x = 2,404,215,792.83/56,388.26
6. Step 6: Final answer
   x = 42,636.81