Finding the Fourth Proportional to 78,961.18, 108,915.51 and 47,105.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,961.18 : 108,915.51 = 47,105.50 : x
2. Step 2: Convert to fraction form
   78,961.18/108,915.51 = 47,105.50/x
3. Step 3: Cross multiply
   78,961.18x = 108,915.51 × 47,105.50
4. Step 4: Simplify right side
   78,961.18x = 5,130,519,556.31
5. Step 5: Solve for x
   x = 5,130,519,556.31/78,961.18
6. Step 6: Final answer
   x = 64,975.21