Finding the Fourth Proportional to 375,871.78, 563,796.69 and 139,209.22

Step by Step Solution

1. Step 1: Write the proportion equation
   375,871.78 : 563,796.69 = 139,209.22 : x
2. Step 2: Convert to fraction form
   375,871.78/563,796.69 = 139,209.22/x
3. Step 3: Cross multiply
   375,871.78x = 563,796.69 × 139,209.22
4. Step 4: Simplify right side
   375,871.78x = 78,485,697,453.48
5. Step 5: Solve for x
   x = 78,485,697,453.48/375,871.78
6. Step 6: Final answer
   x = 208,809.76