Finding the Fourth Proportional to 139,788.42, 209,715.42 and 46,294.20

Step by Step Solution

1. Step 1: Write the proportion equation
   139,788.42 : 209,715.42 = 46,294.20 : x
2. Step 2: Convert to fraction form
   139,788.42/209,715.42 = 46,294.20/x
3. Step 3: Cross multiply
   139,788.42x = 209,715.42 × 46,294.20
4. Step 4: Simplify right side
   139,788.42x = 9,708,607,596.56
5. Step 5: Solve for x
   x = 9,708,607,596.56/139,788.42
6. Step 6: Final answer
   x = 69,452.16