Finding the Fourth Proportional to 215,128.50, 322,692.58 and 65,368.18

Step by Step Solution

1. Step 1: Write the proportion equation
   215,128.50 : 322,692.58 = 65,368.18 : x
2. Step 2: Convert to fraction form
   215,128.50/322,692.58 = 65,368.18/x
3. Step 3: Cross multiply
   215,128.50x = 322,692.58 × 65,368.18
4. Step 4: Simplify right side
   215,128.50x = 21,093,826,654.10
5. Step 5: Solve for x
   x = 21,093,826,654.10/215,128.50
6. Step 6: Final answer
   x = 98,052.22