Finding the Fourth Proportional to 55,978.32, 77,249.16 and 30,830.16

Step by Step Solution

1. Step 1: Write the proportion equation
   55,978.32 : 77,249.16 = 30,830.16 : x
2. Step 2: Convert to fraction form
   55,978.32/77,249.16 = 30,830.16/x
3. Step 3: Cross multiply
   55,978.32x = 77,249.16 × 30,830.16
4. Step 4: Simplify right side
   55,978.32x = 2,381,603,962.67
5. Step 5: Solve for x
   x = 2,381,603,962.67/55,978.32
6. Step 6: Final answer
   x = 42,545.11