Finding the Fourth Proportional to 71,662.08, 98,667.78 and 65,019.06

Step by Step Solution

1. Step 1: Write the proportion equation
   71,662.08 : 98,667.78 = 65,019.06 : x
2. Step 2: Convert to fraction form
   71,662.08/98,667.78 = 65,019.06/x
3. Step 3: Cross multiply
   71,662.08x = 98,667.78 × 65,019.06
4. Step 4: Simplify right side
   71,662.08x = 6,415,286,307.89
5. Step 5: Solve for x
   x = 6,415,286,307.89/71,662.08
6. Step 6: Final answer
   x = 89,521.35