Finding the Fourth Proportional to 456,870.78, 685,340.73 and 141,359.58

Step by Step Solution

1. Step 1: Write the proportion equation
   456,870.78 : 685,340.73 = 141,359.58 : x
2. Step 2: Convert to fraction form
   456,870.78/685,340.73 = 141,359.58/x
3. Step 3: Cross multiply
   456,870.78x = 685,340.73 × 141,359.58
4. Step 4: Simplify right side
   456,870.78x = 96,879,477,749.69
5. Step 5: Solve for x
   x = 96,879,477,749.69/456,870.78
6. Step 6: Final answer
   x = 212,050.06