Finding the Fourth Proportional to 150,939.31, 208,076.75 and 105,476.18

Step by Step Solution

1. Step 1: Write the proportion equation
   150,939.31 : 208,076.75 = 105,476.18 : x
2. Step 2: Convert to fraction form
   150,939.31/208,076.75 = 105,476.18/x
3. Step 3: Cross multiply
   150,939.31x = 208,076.75 × 105,476.18
4. Step 4: Simplify right side
   150,939.31x = 21,947,140,729.63
5. Step 5: Solve for x
   x = 21,947,140,729.63/150,939.31
6. Step 6: Final answer
   x = 145,403.75