Finding the Fourth Proportional to 78,103.41, 107,782.47 and 42,293.40

Step by Step Solution

1. Step 1: Write the proportion equation
   78,103.41 : 107,782.47 = 42,293.40 : x
2. Step 2: Convert to fraction form
   78,103.41/107,782.47 = 42,293.40/x
3. Step 3: Cross multiply
   78,103.41x = 107,782.47 × 42,293.40
4. Step 4: Simplify right side
   78,103.41x = 4,558,487,116.70
5. Step 5: Solve for x
   x = 4,558,487,116.70/78,103.41
6. Step 6: Final answer
   x = 58,364.76