Finding the Fourth Proportional to 56,012.06, 77,297.55 and 30,861.56

Step by Step Solution

1. Step 1: Write the proportion equation
   56,012.06 : 77,297.55 = 30,861.56 : x
2. Step 2: Convert to fraction form
   56,012.06/77,297.55 = 30,861.56/x
3. Step 3: Cross multiply
   56,012.06x = 77,297.55 × 30,861.56
4. Step 4: Simplify right side
   56,012.06x = 2,385,522,977.18
5. Step 5: Solve for x
   x = 2,385,522,977.18/56,012.06
6. Step 6: Final answer
   x = 42,589.45