Finding the Fourth Proportional to 271,662.45, 407,475.45 and 71,978.55

Step by Step Solution

1. Step 1: Write the proportion equation
   271,662.45 : 407,475.45 = 71,978.55 : x
2. Step 2: Convert to fraction form
   271,662.45/407,475.45 = 71,978.55/x
3. Step 3: Cross multiply
   271,662.45x = 407,475.45 × 71,978.55
4. Step 4: Simplify right side
   271,662.45x = 29,329,492,051.60
5. Step 5: Solve for x
   x = 29,329,492,051.60/271,662.45
6. Step 6: Final answer
   x = 107,963.00