Finding the Fourth Proportional to 78,084.51, 107,712.66 and 49,395.30

Step by Step Solution

1. Step 1: Write the proportion equation
   78,084.51 : 107,712.66 = 49,395.30 : x
2. Step 2: Convert to fraction form
   78,084.51/107,712.66 = 49,395.30/x
3. Step 3: Cross multiply
   78,084.51x = 107,712.66 × 49,395.30
4. Step 4: Simplify right side
   78,084.51x = 5,320,499,154.50
5. Step 5: Solve for x
   x = 5,320,499,154.50/78,084.51
6. Step 6: Final answer
   x = 68,137.70