Finding the Fourth Proportional to 78,178.49, 107,897.89 and 49,500.81

Step by Step Solution

1. Step 1: Write the proportion equation
   78,178.49 : 107,897.89 = 49,500.81 : x
2. Step 2: Convert to fraction form
   78,178.49/107,897.89 = 49,500.81/x
3. Step 3: Cross multiply
   78,178.49x = 107,897.89 × 49,500.81
4. Step 4: Simplify right side
   78,178.49x = 5,341,033,222.04
5. Step 5: Solve for x
   x = 5,341,033,222.04/78,178.49
6. Step 6: Final answer
   x = 68,318.45