Finding the Fourth Proportional to 78,100.12, 107,778.23 and 42,290.16

Step by Step Solution

1. Step 1: Write the proportion equation
   78,100.12 : 107,778.23 = 42,290.16 : x
2. Step 2: Convert to fraction form
   78,100.12/107,778.23 = 42,290.16/x
3. Step 3: Cross multiply
   78,100.12x = 107,778.23 × 42,290.16
4. Step 4: Simplify right side
   78,100.12x = 4,557,958,591.22
5. Step 5: Solve for x
   x = 4,557,958,591.22/78,100.12
6. Step 6: Final answer
   x = 58,360.46