Finding the Fourth Proportional to 103,404.52, 155,152.86 and 54,145

Step by Step Solution

1. Step 1: Write the proportion equation
   103,404.52 : 155,152.86 = 54,145 : x
2. Step 2: Convert to fraction form
   103,404.52/155,152.86 = 54,145/x
3. Step 3: Cross multiply
   103,404.52x = 155,152.86 × 54,145
4. Step 4: Simplify right side
   103,404.52x = 8,400,751,604.70
5. Step 5: Solve for x
   x = 8,400,751,604.70/103,404.52
6. Step 6: Final answer
   x = 81,241.63