Finding the Fourth Proportional to 56,066.20, 77,371.06 and 30,915.68

Step by Step Solution

1. Step 1: Write the proportion equation
   56,066.20 : 77,371.06 = 30,915.68 : x
2. Step 2: Convert to fraction form
   56,066.20/77,371.06 = 30,915.68/x
3. Step 3: Cross multiply
   56,066.20x = 77,371.06 × 30,915.68
4. Step 4: Simplify right side
   56,066.20x = 2,391,978,932.22
5. Step 5: Solve for x
   x = 2,391,978,932.22/56,066.20
6. Step 6: Final answer
   x = 42,663.48