Finding the Fourth Proportional to 56,428.82, 77,871.20 and 30,936.59

Step by Step Solution

1. Step 1: Write the proportion equation
   56,428.82 : 77,871.20 = 30,936.59 : x
2. Step 2: Convert to fraction form
   56,428.82/77,871.20 = 30,936.59/x
3. Step 3: Cross multiply
   56,428.82x = 77,871.20 × 30,936.59
4. Step 4: Simplify right side
   56,428.82x = 2,409,068,843.17
5. Step 5: Solve for x
   x = 2,409,068,843.17/56,428.82
6. Step 6: Final answer
   x = 42,692.17