Finding the Fourth Proportional to 271,454.48, 407,184.86 and 81,916.49

Step by Step Solution

1. Step 1: Write the proportion equation
   271,454.48 : 407,184.86 = 81,916.49 : x
2. Step 2: Convert to fraction form
   271,454.48/407,184.86 = 81,916.49/x
3. Step 3: Cross multiply
   271,454.48x = 407,184.86 × 81,916.49
4. Step 4: Simplify right side
   271,454.48x = 33,355,152,066.83
5. Step 5: Solve for x
   x = 33,355,152,066.83/271,454.48
6. Step 6: Final answer
   x = 122,875.68