Finding the Fourth Proportional to 250,389.15, 345,656.76 and 142,938.42

Step by Step Solution

1. Step 1: Write the proportion equation
   250,389.15 : 345,656.76 = 142,938.42 : x
2. Step 2: Convert to fraction form
   250,389.15/345,656.76 = 142,938.42/x
3. Step 3: Cross multiply
   250,389.15x = 345,656.76 × 142,938.42
4. Step 4: Simplify right side
   250,389.15x = 49,407,631,136.72
5. Step 5: Solve for x
   x = 49,407,631,136.72/250,389.15
6. Step 6: Final answer
   x = 197,323.37