Finding the Fourth Proportional to 117,978.92, 162,840.32 and 72,695.72

Step by Step Solution

1. Step 1: Write the proportion equation
   117,978.92 : 162,840.32 = 72,695.72 : x
2. Step 2: Convert to fraction form
   117,978.92/162,840.32 = 72,695.72/x
3. Step 3: Cross multiply
   117,978.92x = 162,840.32 × 72,695.72
4. Step 4: Simplify right side
   117,978.92x = 11,837,794,307.43
5. Step 5: Solve for x
   x = 11,837,794,307.43/117,978.92
6. Step 6: Final answer
   x = 100,338.22