Finding the Fourth Proportional to 78,112.69, 107,795.55 and 42,302.86

Step by Step Solution

1. Step 1: Write the proportion equation
   78,112.69 : 107,795.55 = 42,302.86 : x
2. Step 2: Convert to fraction form
   78,112.69/107,795.55 = 42,302.86/x
3. Step 3: Cross multiply
   78,112.69x = 107,795.55 × 42,302.86
4. Step 4: Simplify right side
   78,112.69x = 4,560,060,060.27
5. Step 5: Solve for x
   x = 4,560,060,060.27/78,112.69
6. Step 6: Final answer
   x = 58,377.97