Finding the Fourth Proportional to 56,429.12, 77,871.71 and 30,936.94

Step by Step Solution

1. Step 1: Write the proportion equation
   56,429.12 : 77,871.71 = 30,936.94 : x
2. Step 2: Convert to fraction form
   56,429.12/77,871.71 = 30,936.94/x
3. Step 3: Cross multiply
   56,429.12x = 77,871.71 × 30,936.94
4. Step 4: Simplify right side
   56,429.12x = 2,409,112,302.63
5. Step 5: Solve for x
   x = 2,409,112,302.63/56,429.12
6. Step 6: Final answer
   x = 42,692.71