Finding the Fourth Proportional to 78,155.35, 107,849.28 and 49,858

Step by Step Solution

1. Step 1: Write the proportion equation
   78,155.35 : 107,849.28 = 49,858 : x
2. Step 2: Convert to fraction form
   78,155.35/107,849.28 = 49,858/x
3. Step 3: Cross multiply
   78,155.35x = 107,849.28 × 49,858
4. Step 4: Simplify right side
   78,155.35x = 5,377,149,402.24
5. Step 5: Solve for x
   x = 5,377,149,402.24/78,155.35
6. Step 6: Final answer
   x = 68,800.78