Finding the Fourth Proportional to 76,734.78, 105,890.49 and 42,741.42

Step by Step Solution

1. Step 1: Write the proportion equation
   76,734.78 : 105,890.49 = 42,741.42 : x
2. Step 2: Convert to fraction form
   76,734.78/105,890.49 = 42,741.42/x
3. Step 3: Cross multiply
   76,734.78x = 105,890.49 × 42,741.42
4. Step 4: Simplify right side
   76,734.78x = 4,525,909,907.10
5. Step 5: Solve for x
   x = 4,525,909,907.10/76,734.78
6. Step 6: Final answer
   x = 58,981.21