Finding the Fourth Proportional to 55,911, 77,157.18 and 30,760.50

Step by Step Solution

1. Step 1: Write the proportion equation
   55,911 : 77,157.18 = 30,760.50 : x
2. Step 2: Convert to fraction form
   55,911/77,157.18 = 30,760.50/x
3. Step 3: Cross multiply
   55,911x = 77,157.18 × 30,760.50
4. Step 4: Simplify right side
   55,911x = 2,373,393,435.39
5. Step 5: Solve for x
   x = 2,373,393,435.39/55,911
6. Step 6: Final answer
   x = 42,449.49