Finding the Fourth Proportional to 65,191.20, 89,948.78 and 43,641.96

Step by Step Solution

1. Step 1: Write the proportion equation
   65,191.20 : 89,948.78 = 43,641.96 : x
2. Step 2: Convert to fraction form
   65,191.20/89,948.78 = 43,641.96/x
3. Step 3: Cross multiply
   65,191.20x = 89,948.78 × 43,641.96
4. Step 4: Simplify right side
   65,191.20x = 3,925,541,058.81
5. Step 5: Solve for x
   x = 3,925,541,058.81/65,191.20
6. Step 6: Final answer
   x = 60,215.81