Finding the Fourth Proportional to 78,819.34, 118,168.86 and 39,404.20

Step by Step Solution

1. Step 1: Write the proportion equation
   78,819.34 : 118,168.86 = 39,404.20 : x
2. Step 2: Convert to fraction form
   78,819.34/118,168.86 = 39,404.20/x
3. Step 3: Cross multiply
   78,819.34x = 118,168.86 × 39,404.20
4. Step 4: Simplify right side
   78,819.34x = 4,656,349,393.21
5. Step 5: Solve for x
   x = 4,656,349,393.21/78,819.34
6. Step 6: Final answer
   x = 59,076.23