Finding the Fourth Proportional to 64,013.31, 88,379.97 and 57,287.37

Step by Step Solution

1. Step 1: Write the proportion equation
   64,013.31 : 88,379.97 = 57,287.37 : x
2. Step 2: Convert to fraction form
   64,013.31/88,379.97 = 57,287.37/x
3. Step 3: Cross multiply
   64,013.31x = 88,379.97 × 57,287.37
4. Step 4: Simplify right side
   64,013.31x = 5,063,056,041.98
5. Step 5: Solve for x
   x = 5,063,056,041.98/64,013.31
6. Step 6: Final answer
   x = 79,093.80