Finding the Fourth Proportional to 139,291.36, 208,892.72 and 45,775.52

Step by Step Solution

1. Step 1: Write the proportion equation
   139,291.36 : 208,892.72 = 45,775.52 : x
2. Step 2: Convert to fraction form
   139,291.36/208,892.72 = 45,775.52/x
3. Step 3: Cross multiply
   139,291.36x = 208,892.72 × 45,775.52
4. Step 4: Simplify right side
   139,291.36x = 9,562,172,882.21
5. Step 5: Solve for x
   x = 9,562,172,882.21/139,291.36
6. Step 6: Final answer
   x = 68,648.72