Finding the Fourth Proportional to 315,887.62, 435,931.89 and 172,656.94

Step by Step Solution

1. Step 1: Write the proportion equation
   315,887.62 : 435,931.89 = 172,656.94 : x
2. Step 2: Convert to fraction form
   315,887.62/435,931.89 = 172,656.94/x
3. Step 3: Cross multiply
   315,887.62x = 435,931.89 × 172,656.94
4. Step 4: Simplify right side
   315,887.62x = 75,266,666,175.82
5. Step 5: Solve for x
   x = 75,266,666,175.82/315,887.62
6. Step 6: Final answer
   x = 238,270.39