Finding the Fourth Proportional to 56,258.38, 77,636.28 and 31,107.88

Step by Step Solution

1. Step 1: Write the proportion equation
   56,258.38 : 77,636.28 = 31,107.88 : x
2. Step 2: Convert to fraction form
   56,258.38/77,636.28 = 31,107.88/x
3. Step 3: Cross multiply
   56,258.38x = 77,636.28 × 31,107.88
4. Step 4: Simplify right side
   56,258.38x = 2,415,100,081.89
5. Step 5: Solve for x
   x = 2,415,100,081.89/56,258.38
6. Step 6: Final answer
   x = 42,928.72