Finding the Fourth Proportional to 150,978.72, 208,428.48 and 118,733.40

Step by Step Solution

1. Step 1: Write the proportion equation
   150,978.72 : 208,428.48 = 118,733.40 : x
2. Step 2: Convert to fraction form
   150,978.72/208,428.48 = 118,733.40/x
3. Step 3: Cross multiply
   150,978.72x = 208,428.48 × 118,733.40
4. Step 4: Simplify right side
   150,978.72x = 24,747,422,087.23
5. Step 5: Solve for x
   x = 24,747,422,087.23/150,978.72
6. Step 6: Final answer
   x = 163,913.31