Finding the Fourth Proportional to 78,476.08, 108,297.90 and 42,665.30

Step by Step Solution

1. Step 1: Write the proportion equation
   78,476.08 : 108,297.90 = 42,665.30 : x
2. Step 2: Convert to fraction form
   78,476.08/108,297.90 = 42,665.30/x
3. Step 3: Cross multiply
   78,476.08x = 108,297.90 × 42,665.30
4. Step 4: Simplify right side
   78,476.08x = 4,620,562,392.87
5. Step 5: Solve for x
   x = 4,620,562,392.87/78,476.08
6. Step 6: Final answer
   x = 58,878.61