Finding the Fourth Proportional to 56,311.96, 77,709.83 and 30,818.07

Step by Step Solution

1. Step 1: Write the proportion equation
   56,311.96 : 77,709.83 = 30,818.07 : x
2. Step 2: Convert to fraction form
   56,311.96/77,709.83 = 30,818.07/x
3. Step 3: Cross multiply
   56,311.96x = 77,709.83 × 30,818.07
4. Step 4: Simplify right side
   56,311.96x = 2,394,866,999.89
5. Step 5: Solve for x
   x = 2,394,866,999.89/56,311.96
6. Step 6: Final answer
   x = 42,528.57