Finding the Fourth Proportional to 76,105.78, 105,068.21 and 45,898.75

Step by Step Solution

1. Step 1: Write the proportion equation
   76,105.78 : 105,068.21 = 45,898.75 : x
2. Step 2: Convert to fraction form
   76,105.78/105,068.21 = 45,898.75/x
3. Step 3: Cross multiply
   76,105.78x = 105,068.21 × 45,898.75
4. Step 4: Simplify right side
   76,105.78x = 4,822,499,405.58
5. Step 5: Solve for x
   x = 4,822,499,405.58/76,105.78
6. Step 6: Final answer
   x = 63,365.75