Finding the Fourth Proportional to 63,654.78, 87,164.52 and 61,145.20

Step by Step Solution

1. Step 1: Write the proportion equation
   63,654.78 : 87,164.52 = 61,145.20 : x
2. Step 2: Convert to fraction form
   63,654.78/87,164.52 = 61,145.20/x
3. Step 3: Cross multiply
   63,654.78x = 87,164.52 × 61,145.20
4. Step 4: Simplify right side
   63,654.78x = 5,329,692,008.30
5. Step 5: Solve for x
   x = 5,329,692,008.30/63,654.78
6. Step 6: Final answer
   x = 83,728.07