Finding the Fourth Proportional to 318,714.72, 478,107.10 and 105,404.93

Step by Step Solution

1. Step 1: Write the proportion equation
   318,714.72 : 478,107.10 = 105,404.93 : x
2. Step 2: Convert to fraction form
   318,714.72/478,107.10 = 105,404.93/x
3. Step 3: Cross multiply
   318,714.72x = 478,107.10 × 105,404.93
4. Step 4: Simplify right side
   318,714.72x = 50,394,844,949.40
5. Step 5: Solve for x
   x = 50,394,844,949.40/318,714.72
6. Step 6: Final answer
   x = 158,118.98