Finding the Fourth Proportional to 78,180.86, 107,886.70 and 42,370.10

Step by Step Solution

1. Step 1: Write the proportion equation
   78,180.86 : 107,886.70 = 42,370.10 : x
2. Step 2: Convert to fraction form
   78,180.86/107,886.70 = 42,370.10/x
3. Step 3: Cross multiply
   78,180.86x = 107,886.70 × 42,370.10
4. Step 4: Simplify right side
   78,180.86x = 4,571,170,792.64
5. Step 5: Solve for x
   x = 4,571,170,792.64/78,180.86
6. Step 6: Final answer
   x = 58,469.18