Finding the Fourth Proportional to 65,724.16, 90,741.72 and 58,638.28

Step by Step Solution

1. Step 1: Write the proportion equation
   65,724.16 : 90,741.72 = 58,638.28 : x
2. Step 2: Convert to fraction form
   65,724.16/90,741.72 = 58,638.28/x
3. Step 3: Cross multiply
   65,724.16x = 90,741.72 × 58,638.28
4. Step 4: Simplify right side
   65,724.16x = 5,320,938,385.04
5. Step 5: Solve for x
   x = 5,320,938,385.04/65,724.16
6. Step 6: Final answer
   x = 80,958.64