Finding the Fourth Proportional to 65,191.83, 89,961.62 and 40,036.47

Step by Step Solution

1. Step 1: Write the proportion equation
   65,191.83 : 89,961.62 = 40,036.47 : x
2. Step 2: Convert to fraction form
   65,191.83/89,961.62 = 40,036.47/x
3. Step 3: Cross multiply
   65,191.83x = 89,961.62 × 40,036.47
4. Step 4: Simplify right side
   65,191.83x = 3,601,745,500.10
5. Step 5: Solve for x
   x = 3,601,745,500.10/65,191.83
6. Step 6: Final answer
   x = 55,248.42