Finding the Fourth Proportional to 39,665.34, 54,735.39 and 21,759.93

Step by Step Solution

1. Step 1: Write the proportion equation
   39,665.34 : 54,735.39 = 21,759.93 : x
2. Step 2: Convert to fraction form
   39,665.34/54,735.39 = 21,759.93/x
3. Step 3: Cross multiply
   39,665.34x = 54,735.39 × 21,759.93
4. Step 4: Simplify right side
   39,665.34x = 1,191,038,254.92
5. Step 5: Solve for x
   x = 1,191,038,254.92/39,665.34
6. Step 6: Final answer
   x = 30,027.18