Finding the Fourth Proportional to 55,981.59, 77,251.05 and 30,831.09

Step by Step Solution

1. Step 1: Write the proportion equation
   55,981.59 : 77,251.05 = 30,831.09 : x
2. Step 2: Convert to fraction form
   55,981.59/77,251.05 = 30,831.09/x
3. Step 3: Cross multiply
   55,981.59x = 77,251.05 × 30,831.09
4. Step 4: Simplify right side
   55,981.59x = 2,381,734,075.14
5. Step 5: Solve for x
   x = 2,381,734,075.14/55,981.59
6. Step 6: Final answer
   x = 42,544.95