Finding the Fourth Proportional to 55,300.48, 76,314.66 and 31,427.20

Step by Step Solution

1. Step 1: Write the proportion equation
   55,300.48 : 76,314.66 = 31,427.20 : x
2. Step 2: Convert to fraction form
   55,300.48/76,314.66 = 31,427.20/x
3. Step 3: Cross multiply
   55,300.48x = 76,314.66 × 31,427.20
4. Step 4: Simplify right side
   55,300.48x = 2,398,356,082.75
5. Step 5: Solve for x
   x = 2,398,356,082.75/55,300.48
6. Step 6: Final answer
   x = 43,369.53