Finding the Fourth Proportional to 250,078.02, 345,100.91 and 142,645.79

Step by Step Solution

1. Step 1: Write the proportion equation
   250,078.02 : 345,100.91 = 142,645.79 : x
2. Step 2: Convert to fraction form
   250,078.02/345,100.91 = 142,645.79/x
3. Step 3: Cross multiply
   250,078.02x = 345,100.91 × 142,645.79
4. Step 4: Simplify right side
   250,078.02x = 49,227,192,086.19
5. Step 5: Solve for x
   x = 49,227,192,086.19/250,078.02
6. Step 6: Final answer
   x = 196,847.34