Finding the Fourth Proportional to 76,433.50, 105,488.22 and 42,899.50

Step by Step Solution

1. Step 1: Write the proportion equation
   76,433.50 : 105,488.22 = 42,899.50 : x
2. Step 2: Convert to fraction form
   76,433.50/105,488.22 = 42,899.50/x
3. Step 3: Cross multiply
   76,433.50x = 105,488.22 × 42,899.50
4. Step 4: Simplify right side
   76,433.50x = 4,525,391,893.89
5. Step 5: Solve for x
   x = 4,525,391,893.89/76,433.50
6. Step 6: Final answer
   x = 59,206.92