Finding the Fourth Proportional to 76,556.28, 105,644.38 and 42,564.72

Step by Step Solution

1. Step 1: Write the proportion equation
   76,556.28 : 105,644.38 = 42,564.72 : x
2. Step 2: Convert to fraction form
   76,556.28/105,644.38 = 42,564.72/x
3. Step 3: Cross multiply
   76,556.28x = 105,644.38 × 42,564.72
4. Step 4: Simplify right side
   76,556.28x = 4,496,723,454.27
5. Step 5: Solve for x
   x = 4,496,723,454.27/76,556.28
6. Step 6: Final answer
   x = 58,737.49