Finding the Fourth Proportional to 118,105.32, 162,980.54 and 64,389.28

Step by Step Solution

1. Step 1: Write the proportion equation
   118,105.32 : 162,980.54 = 64,389.28 : x
2. Step 2: Convert to fraction form
   118,105.32/162,980.54 = 64,389.28/x
3. Step 3: Cross multiply
   118,105.32x = 162,980.54 × 64,389.28
4. Step 4: Simplify right side
   118,105.32x = 10,494,199,624.61
5. Step 5: Solve for x
   x = 10,494,199,624.61/118,105.32
6. Step 6: Final answer
   x = 88,854.59