Finding the Fourth Proportional to 118,005.61, 162,846.84 and 64,290.46

Step by Step Solution

1. Step 1: Write the proportion equation
   118,005.61 : 162,846.84 = 64,290.46 : x
2. Step 2: Convert to fraction form
   118,005.61/162,846.84 = 64,290.46/x
3. Step 3: Cross multiply
   118,005.61x = 162,846.84 × 64,290.46
4. Step 4: Simplify right side
   118,005.61x = 10,469,498,253.15
5. Step 5: Solve for x
   x = 10,469,498,253.15/118,005.61
6. Step 6: Final answer
   x = 88,720.34