Finding the Fourth Proportional to 89,072.74, 122,913.98 and 48,780

Step by Step Solution

1. Step 1: Write the proportion equation
   89,072.74 : 122,913.98 = 48,780 : x
2. Step 2: Convert to fraction form
   89,072.74/122,913.98 = 48,780/x
3. Step 3: Cross multiply
   89,072.74x = 122,913.98 × 48,780
4. Step 4: Simplify right side
   89,072.74x = 5,995,743,944.40
5. Step 5: Solve for x
   x = 5,995,743,944.40/89,072.74
6. Step 6: Final answer
   x = 67,312.89