Finding the Fourth Proportional to 76,231.50, 105,199.47 and 42,697.50

Step by Step Solution

1. Step 1: Write the proportion equation
   76,231.50 : 105,199.47 = 42,697.50 : x
2. Step 2: Convert to fraction form
   76,231.50/105,199.47 = 42,697.50/x
3. Step 3: Cross multiply
   76,231.50x = 105,199.47 × 42,697.50
4. Step 4: Simplify right side
   76,231.50x = 4,491,754,370.33
5. Step 5: Solve for x
   x = 4,491,754,370.33/76,231.50
6. Step 6: Final answer
   x = 58,922.55