Finding the Fourth Proportional to 76,763.78, 105,940.10 and 42,314.63

Step by Step Solution

1. Step 1: Write the proportion equation
   76,763.78 : 105,940.10 = 42,314.63 : x
2. Step 2: Convert to fraction form
   76,763.78/105,940.10 = 42,314.63/x
3. Step 3: Cross multiply
   76,763.78x = 105,940.10 × 42,314.63
4. Step 4: Simplify right side
   76,763.78x = 4,482,816,678.11
5. Step 5: Solve for x
   x = 4,482,816,678.11/76,763.78
6. Step 6: Final answer
   x = 58,397.55