Finding the Fourth Proportional to 78,103.74, 107,783.56 and 42,293.90

Step by Step Solution

1. Step 1: Write the proportion equation
   78,103.74 : 107,783.56 = 42,293.90 : x
2. Step 2: Convert to fraction form
   78,103.74/107,783.56 = 42,293.90/x
3. Step 3: Cross multiply
   78,103.74x = 107,783.56 × 42,293.90
4. Step 4: Simplify right side
   78,103.74x = 4,558,586,824.33
5. Step 5: Solve for x
   x = 4,558,586,824.33/78,103.74
6. Step 6: Final answer
   x = 58,365.79