Finding the Fourth Proportional to 150,978.32, 208,352.71 and 82,998.15

Step by Step Solution

1. Step 1: Write the proportion equation
   150,978.32 : 208,352.71 = 82,998.15 : x
2. Step 2: Convert to fraction form
   150,978.32/208,352.71 = 82,998.15/x
3. Step 3: Cross multiply
   150,978.32x = 208,352.71 × 82,998.15
4. Step 4: Simplify right side
   150,978.32x = 17,292,889,062.50
5. Step 5: Solve for x
   x = 17,292,889,062.50/150,978.32
6. Step 6: Final answer
   x = 114,538.89