Finding the Fourth Proportional to 86,128.94, 118,867.78 and 47,892.30

Step by Step Solution

1. Step 1: Write the proportion equation
   86,128.94 : 118,867.78 = 47,892.30 : x
2. Step 2: Convert to fraction form
   86,128.94/118,867.78 = 47,892.30/x
3. Step 3: Cross multiply
   86,128.94x = 118,867.78 × 47,892.30
4. Step 4: Simplify right side
   86,128.94x = 5,692,851,380.09
5. Step 5: Solve for x
   x = 5,692,851,380.09/86,128.94
6. Step 6: Final answer
   x = 66,096.85