Finding the Fourth Proportional to 118,019.63, 162,865.04 and 64,305.09

Step by Step Solution

1. Step 1: Write the proportion equation
   118,019.63 : 162,865.04 = 64,305.09 : x
2. Step 2: Convert to fraction form
   118,019.63/162,865.04 = 64,305.09/x
3. Step 3: Cross multiply
   118,019.63x = 162,865.04 × 64,305.09
4. Step 4: Simplify right side
   118,019.63x = 10,473,050,733.53
5. Step 5: Solve for x
   x = 10,473,050,733.53/118,019.63
6. Step 6: Final answer
   x = 88,739.90