Finding the Fourth Proportional to 78,643.99, 108,528.15 and 42,833.89

Step by Step Solution

1. Step 1: Write the proportion equation
   78,643.99 : 108,528.15 = 42,833.89 : x
2. Step 2: Convert to fraction form
   78,643.99/108,528.15 = 42,833.89/x
3. Step 3: Cross multiply
   78,643.99x = 108,528.15 × 42,833.89
4. Step 4: Simplify right side
   78,643.99x = 4,648,682,839.00
5. Step 5: Solve for x
   x = 4,648,682,839.00/78,643.99
6. Step 6: Final answer
   x = 59,110.47