Finding the Fourth Proportional to 118,139.33, 163,029.31 and 64,425.38

Step by Step Solution

1. Step 1: Write the proportion equation
   118,139.33 : 163,029.31 = 64,425.38 : x
2. Step 2: Convert to fraction form
   118,139.33/163,029.31 = 64,425.38/x
3. Step 3: Cross multiply
   118,139.33x = 163,029.31 × 64,425.38
4. Step 4: Simplify right side
   118,139.33x = 10,503,224,271.68
5. Step 5: Solve for x
   x = 10,503,224,271.68/118,139.33
6. Step 6: Final answer
   x = 88,905.40