Finding the Fourth Proportional to 78,654.42, 117,980.88 and 31,896.18

Step by Step Solution

1. Step 1: Write the proportion equation
   78,654.42 : 117,980.88 = 31,896.18 : x
2. Step 2: Convert to fraction form
   78,654.42/117,980.88 = 31,896.18/x
3. Step 3: Cross multiply
   78,654.42x = 117,980.88 × 31,896.18
4. Step 4: Simplify right side
   78,654.42x = 3,763,139,385.04
5. Step 5: Solve for x
   x = 3,763,139,385.04/78,654.42
6. Step 6: Final answer
   x = 47,843.97