Finding the Fourth Proportional to 78,640.82, 108,525.57 and 42,830.81

Step by Step Solution

1. Step 1: Write the proportion equation
   78,640.82 : 108,525.57 = 42,830.81 : x
2. Step 2: Convert to fraction form
   78,640.82/108,525.57 = 42,830.81/x
3. Step 3: Cross multiply
   78,640.82x = 108,525.57 × 42,830.81
4. Step 4: Simplify right side
   78,640.82x = 4,648,237,526.18
5. Step 5: Solve for x
   x = 4,648,237,526.18/78,640.82
6. Step 6: Final answer
   x = 59,107.19