Finding the Fourth Proportional to 271,916.47, 407,874.86 and 103,397.90

Step by Step Solution

1. Step 1: Write the proportion equation
   271,916.47 : 407,874.86 = 103,397.90 : x
2. Step 2: Convert to fraction form
   271,916.47/407,874.86 = 103,397.90/x
3. Step 3: Cross multiply
   271,916.47x = 407,874.86 × 103,397.90
4. Step 4: Simplify right side
   271,916.47x = 42,173,401,818.17
5. Step 5: Solve for x
   x = 42,173,401,818.17/271,916.47
6. Step 6: Final answer
   x = 155,096.90