Finding the Fourth Proportional to 65,390.84, 90,290.04 and 50,259.32

Step by Step Solution

1. Step 1: Write the proportion equation
   65,390.84 : 90,290.04 = 50,259.32 : x
2. Step 2: Convert to fraction form
   65,390.84/90,290.04 = 50,259.32/x
3. Step 3: Cross multiply
   65,390.84x = 90,290.04 × 50,259.32
4. Step 4: Simplify right side
   65,390.84x = 4,537,916,013.17
5. Step 5: Solve for x
   x = 4,537,916,013.17/65,390.84
6. Step 6: Final answer
   x = 69,396.81