Finding the Fourth Proportional to 76,423.50, 105,474.15 and 42,889.50

Step by Step Solution

1. Step 1: Write the proportion equation
   76,423.50 : 105,474.15 = 42,889.50 : x
2. Step 2: Convert to fraction form
   76,423.50/105,474.15 = 42,889.50/x
3. Step 3: Cross multiply
   76,423.50x = 105,474.15 × 42,889.50
4. Step 4: Simplify right side
   76,423.50x = 4,523,733,556.43
5. Step 5: Solve for x
   x = 4,523,733,556.43/76,423.50
6. Step 6: Final answer
   x = 59,192.96