Finding the Fourth Proportional to 76,342.50, 105,340.50 and 49,521.78

Step by Step Solution

1. Step 1: Write the proportion equation
   76,342.50 : 105,340.50 = 49,521.78 : x
2. Step 2: Convert to fraction form
   76,342.50/105,340.50 = 49,521.78/x
3. Step 3: Cross multiply
   76,342.50x = 105,340.50 × 49,521.78
4. Step 4: Simplify right side
   76,342.50x = 5,216,649,066.09
5. Step 5: Solve for x
   x = 5,216,649,066.09/76,342.50
6. Step 6: Final answer
   x = 68,332.17