Finding the Fourth Proportional to 62,659.35, 86,419.53 and 55,089.48

Step by Step Solution

1. Step 1: Write the proportion equation
   62,659.35 : 86,419.53 = 55,089.48 : x
2. Step 2: Convert to fraction form
   62,659.35/86,419.53 = 55,089.48/x
3. Step 3: Cross multiply
   62,659.35x = 86,419.53 × 55,089.48
4. Step 4: Simplify right side
   62,659.35x = 4,760,806,969.54
5. Step 5: Solve for x
   x = 4,760,806,969.54/62,659.35
6. Step 6: Final answer
   x = 75,979.19