Finding the Fourth Proportional to 56,427.48, 77,869.72 and 30,934

Step by Step Solution

1. Step 1: Write the proportion equation
   56,427.48 : 77,869.72 = 30,934 : x
2. Step 2: Convert to fraction form
   56,427.48/77,869.72 = 30,934/x
3. Step 3: Cross multiply
   56,427.48x = 77,869.72 × 30,934
4. Step 4: Simplify right side
   56,427.48x = 2,408,821,918.48
5. Step 5: Solve for x
   x = 2,408,821,918.48/56,427.48
6. Step 6: Final answer
   x = 42,688.81