Finding the Fourth Proportional to 56,139.24, 77,469.30 and 30,983.88

Step by Step Solution

1. Step 1: Write the proportion equation
   56,139.24 : 77,469.30 = 30,983.88 : x
2. Step 2: Convert to fraction form
   56,139.24/77,469.30 = 30,983.88/x
3. Step 3: Cross multiply
   56,139.24x = 77,469.30 × 30,983.88
4. Step 4: Simplify right side
   56,139.24x = 2,400,299,494.88
5. Step 5: Solve for x
   x = 2,400,299,494.88/56,139.24
6. Step 6: Final answer
   x = 42,756.18