Finding the Fourth Proportional to 118,005.76, 162,842.32 and 64,290.52

Step by Step Solution

1. Step 1: Write the proportion equation
   118,005.76 : 162,842.32 = 64,290.52 : x
2. Step 2: Convert to fraction form
   118,005.76/162,842.32 = 64,290.52/x
3. Step 3: Cross multiply
   118,005.76x = 162,842.32 × 64,290.52
4. Step 4: Simplify right side
   118,005.76x = 10,469,217,430.81
5. Step 5: Solve for x
   x = 10,469,217,430.81/118,005.76
6. Step 6: Final answer
   x = 88,717.85