Finding the Fourth Proportional to 510,111.60, 765,143.10 and 173,119.20

Step by Step Solution

1. Step 1: Write the proportion equation
   510,111.60 : 765,143.10 = 173,119.20 : x
2. Step 2: Convert to fraction form
   510,111.60/765,143.10 = 173,119.20/x
3. Step 3: Cross multiply
   510,111.60x = 765,143.10 × 173,119.20
4. Step 4: Simplify right side
   510,111.60x = 132,460,961,357.52
5. Step 5: Solve for x
   x = 132,460,961,357.52/510,111.60
6. Step 6: Final answer
   x = 259,670.55