Finding the Fourth Proportional to 212,775.55, 319,174.27 and 55,005.37

Step by Step Solution

1. Step 1: Write the proportion equation
   212,775.55 : 319,174.27 = 55,005.37 : x
2. Step 2: Convert to fraction form
   212,775.55/319,174.27 = 55,005.37/x
3. Step 3: Cross multiply
   212,775.55x = 319,174.27 × 55,005.37
4. Step 4: Simplify right side
   212,775.55x = 17,556,297,880.38
5. Step 5: Solve for x
   x = 17,556,297,880.38/212,775.55
6. Step 6: Final answer
   x = 82,510.88