Finding the Fourth Proportional to 78,100.58, 107,778.66 and 42,290.66

Step by Step Solution

1. Step 1: Write the proportion equation
   78,100.58 : 107,778.66 = 42,290.66 : x
2. Step 2: Convert to fraction form
   78,100.58/107,778.66 = 42,290.66/x
3. Step 3: Cross multiply
   78,100.58x = 107,778.66 × 42,290.66
4. Step 4: Simplify right side
   78,100.58x = 4,558,030,665.32
5. Step 5: Solve for x
   x = 4,558,030,665.32/78,100.58
6. Step 6: Final answer
   x = 58,361.03