Finding the Fourth Proportional to 103,406.52, 155,155.86 and 54,147

Step by Step Solution

1. Step 1: Write the proportion equation
   103,406.52 : 155,155.86 = 54,147 : x
2. Step 2: Convert to fraction form
   103,406.52/155,155.86 = 54,147/x
3. Step 3: Cross multiply
   103,406.52x = 155,155.86 × 54,147
4. Step 4: Simplify right side
   103,406.52x = 8,401,224,351.42
5. Step 5: Solve for x
   x = 8,401,224,351.42/103,406.52
6. Step 6: Final answer
   x = 81,244.63