Finding the Fourth Proportional to 78,628.07, 108,503.87 and 42,817.29

Step by Step Solution

1. Step 1: Write the proportion equation
   78,628.07 : 108,503.87 = 42,817.29 : x
2. Step 2: Convert to fraction form
   78,628.07/108,503.87 = 42,817.29/x
3. Step 3: Cross multiply
   78,628.07x = 108,503.87 × 42,817.29
4. Step 4: Simplify right side
   78,628.07x = 4,645,841,453.83
5. Step 5: Solve for x
   x = 4,645,841,453.83/78,628.07
6. Step 6: Final answer
   x = 59,086.30