Finding the Fourth Proportional to 275,139.02, 379,530.98 and 173,002.78

Step by Step Solution

1. Step 1: Write the proportion equation
   275,139.02 : 379,530.98 = 173,002.78 : x
2. Step 2: Convert to fraction form
   275,139.02/379,530.98 = 173,002.78/x
3. Step 3: Cross multiply
   275,139.02x = 379,530.98 × 173,002.78
4. Step 4: Simplify right side
   275,139.02x = 65,659,914,636.12
5. Step 5: Solve for x
   x = 65,659,914,636.12/275,139.02
6. Step 6: Final answer
   x = 238,642.69