Finding the Fourth Proportional to 117,738.72, 162,478.62 and 64,023.78

Step by Step Solution

1. Step 1: Write the proportion equation
   117,738.72 : 162,478.62 = 64,023.78 : x
2. Step 2: Convert to fraction form
   117,738.72/162,478.62 = 64,023.78/x
3. Step 3: Cross multiply
   117,738.72x = 162,478.62 × 64,023.78
4. Step 4: Simplify right side
   117,738.72x = 10,402,495,421.58
5. Step 5: Solve for x
   x = 10,402,495,421.58/117,738.72
6. Step 6: Final answer
   x = 88,352.37