Finding the Fourth Proportional to 56,028.16, 77,322.32 and 30,877.60

Step by Step Solution

1. Step 1: Write the proportion equation
   56,028.16 : 77,322.32 = 30,877.60 : x
2. Step 2: Convert to fraction form
   56,028.16/77,322.32 = 30,877.60/x
3. Step 3: Cross multiply
   56,028.16x = 77,322.32 × 30,877.60
4. Step 4: Simplify right side
   56,028.16x = 2,387,527,668.03
5. Step 5: Solve for x
   x = 2,387,527,668.03/56,028.16
6. Step 6: Final answer
   x = 42,612.99