Finding the Fourth Proportional to 275,510.72, 380,243.20 and 153,030.62

Step by Step Solution

1. Step 1: Write the proportion equation
   275,510.72 : 380,243.20 = 153,030.62 : x
2. Step 2: Convert to fraction form
   275,510.72/380,243.20 = 153,030.62/x
3. Step 3: Cross multiply
   275,510.72x = 380,243.20 × 153,030.62
4. Step 4: Simplify right side
   275,510.72x = 58,188,852,646.78
5. Step 5: Solve for x
   x = 58,188,852,646.78/275,510.72
6. Step 6: Final answer
   x = 211,203.59