Finding the Fourth Proportional to 65,055.28, 89,726.74 and 55,996.05

Step by Step Solution

1. Step 1: Write the proportion equation
   65,055.28 : 89,726.74 = 55,996.05 : x
2. Step 2: Convert to fraction form
   65,055.28/89,726.74 = 55,996.05/x
3. Step 3: Cross multiply
   65,055.28x = 89,726.74 × 55,996.05
4. Step 4: Simplify right side
   65,055.28x = 5,024,343,019.38
5. Step 5: Solve for x
   x = 5,024,343,019.38/65,055.28
6. Step 6: Final answer
   x = 77,231.90