Finding the Fourth Proportional to 118,141.74, 162,987.39 and 72,177.48

Step by Step Solution

1. Step 1: Write the proportion equation
   118,141.74 : 162,987.39 = 72,177.48 : x
2. Step 2: Convert to fraction form
   118,141.74/162,987.39 = 72,177.48/x
3. Step 3: Cross multiply
   118,141.74x = 162,987.39 × 72,177.48
4. Step 4: Simplify right side
   118,141.74x = 11,764,019,081.98
5. Step 5: Solve for x
   x = 11,764,019,081.98/118,141.74
6. Step 6: Final answer
   x = 99,575.47