Finding the Fourth Proportional to 118,104.81, 162,985.59 and 64,390.21

Step by Step Solution

1. Step 1: Write the proportion equation
   118,104.81 : 162,985.59 = 64,390.21 : x
2. Step 2: Convert to fraction form
   118,104.81/162,985.59 = 64,390.21/x
3. Step 3: Cross multiply
   118,104.81x = 162,985.59 × 64,390.21
4. Step 4: Simplify right side
   118,104.81x = 10,494,676,367.07
5. Step 5: Solve for x
   x = 10,494,676,367.07/118,104.81
6. Step 6: Final answer
   x = 88,859.01