Finding the Fourth Proportional to 139,782.78, 209,648.25 and 46,276.38

Step by Step Solution

1. Step 1: Write the proportion equation
   139,782.78 : 209,648.25 = 46,276.38 : x
2. Step 2: Convert to fraction form
   139,782.78/209,648.25 = 46,276.38/x
3. Step 3: Cross multiply
   139,782.78x = 209,648.25 × 46,276.38
4. Step 4: Simplify right side
   139,782.78x = 9,701,762,083.34
5. Step 5: Solve for x
   x = 9,701,762,083.34/139,782.78
6. Step 6: Final answer
   x = 69,405.99