Finding the Fourth Proportional to 369,909, 554,896.28 and 103,672.72

Step by Step Solution

1. Step 1: Write the proportion equation
   369,909 : 554,896.28 = 103,672.72 : x
2. Step 2: Convert to fraction form
   369,909/554,896.28 = 103,672.72/x
3. Step 3: Cross multiply
   369,909x = 554,896.28 × 103,672.72
4. Step 4: Simplify right side
   369,909x = 57,527,606,665.48
5. Step 5: Solve for x
   x = 57,527,606,665.48/369,909
6. Step 6: Final answer
   x = 155,518.27