Finding the Fourth Proportional to 118,300.10, 177,450.15 and 71,644.10

Step by Step Solution

1. Step 1: Write the proportion equation
   118,300.10 : 177,450.15 = 71,644.10 : x
2. Step 2: Convert to fraction form
   118,300.10/177,450.15 = 71,644.10/x
3. Step 3: Cross multiply
   118,300.10x = 177,450.15 × 71,644.10
4. Step 4: Simplify right side
   118,300.10x = 12,713,256,291.62
5. Step 5: Solve for x
   x = 12,713,256,291.62/118,300.10
6. Step 6: Final answer
   x = 107,466.15