Finding the Fourth Proportional to 62,667.36, 86,430.72 and 55,097.60

Step by Step Solution

1. Step 1: Write the proportion equation
   62,667.36 : 86,430.72 = 55,097.60 : x
2. Step 2: Convert to fraction form
   62,667.36/86,430.72 = 55,097.60/x
3. Step 3: Cross multiply
   62,667.36x = 86,430.72 × 55,097.60
4. Step 4: Simplify right side
   62,667.36x = 4,762,125,238.27
5. Step 5: Solve for x
   x = 4,762,125,238.27/62,667.36
6. Step 6: Final answer
   x = 75,990.52