Finding the Fourth Proportional to 92,814.75, 128,117.61 and 55,089

Step by Step Solution

1. Step 1: Write the proportion equation
   92,814.75 : 128,117.61 = 55,089 : x
2. Step 2: Convert to fraction form
   92,814.75/128,117.61 = 55,089/x
3. Step 3: Cross multiply
   92,814.75x = 128,117.61 × 55,089
4. Step 4: Simplify right side
   92,814.75x = 7,057,871,017.29
5. Step 5: Solve for x
   x = 7,057,871,017.29/92,814.75
6. Step 6: Final answer
   x = 76,042.56