Finding the Fourth Proportional to 78,545.74, 108,389.88 and 42,735.89

Step by Step Solution

1. Step 1: Write the proportion equation
   78,545.74 : 108,389.88 = 42,735.89 : x
2. Step 2: Convert to fraction form
   78,545.74/108,389.88 = 42,735.89/x
3. Step 3: Cross multiply
   78,545.74x = 108,389.88 × 42,735.89
4. Step 4: Simplify right side
   78,545.74x = 4,632,137,775.11
5. Step 5: Solve for x
   x = 4,632,137,775.11/78,545.74
6. Step 6: Final answer
   x = 58,973.77