Finding the Fourth Proportional to 55,981.50, 77,255.32 and 30,489.06

Step by Step Solution

1. Step 1: Write the proportion equation
   55,981.50 : 77,255.32 = 30,489.06 : x
2. Step 2: Convert to fraction form
   55,981.50/77,255.32 = 30,489.06/x
3. Step 3: Cross multiply
   55,981.50x = 77,255.32 × 30,489.06
4. Step 4: Simplify right side
   55,981.50x = 2,355,441,922.89
5. Step 5: Solve for x
   x = 2,355,441,922.89/55,981.50
6. Step 6: Final answer
   x = 42,075.36