Finding the Fourth Proportional to 78,545.49, 108,389.53 and 42,735.64

Step by Step Solution

1. Step 1: Write the proportion equation
   78,545.49 : 108,389.53 = 42,735.64 : x
2. Step 2: Convert to fraction form
   78,545.49/108,389.53 = 42,735.64/x
3. Step 3: Cross multiply
   78,545.49x = 108,389.53 × 42,735.64
4. Step 4: Simplify right side
   78,545.49x = 4,632,095,933.85
5. Step 5: Solve for x
   x = 4,632,095,933.85/78,545.49
6. Step 6: Final answer
   x = 58,973.42