Finding the Fourth Proportional to 56,145.68, 77,480.88 and 30,995

Step by Step Solution

1. Step 1: Write the proportion equation
   56,145.68 : 77,480.88 = 30,995 : x
2. Step 2: Convert to fraction form
   56,145.68/77,480.88 = 30,995/x
3. Step 3: Cross multiply
   56,145.68x = 77,480.88 × 30,995
4. Step 4: Simplify right side
   56,145.68x = 2,401,519,875.60
5. Step 5: Solve for x
   x = 2,401,519,875.60/56,145.68
6. Step 6: Final answer
   x = 42,773.01