Finding the Fourth Proportional to 115,017.12, 158,722 and 64,716

Step by Step Solution

1. Step 1: Write the proportion equation
   115,017.12 : 158,722 = 64,716 : x
2. Step 2: Convert to fraction form
   115,017.12/158,722 = 64,716/x
3. Step 3: Cross multiply
   115,017.12x = 158,722 × 64,716
4. Step 4: Simplify right side
   115,017.12x = 10,271,852,952
5. Step 5: Solve for x
   x = 10,271,852,952/115,017.12
6. Step 6: Final answer
   x = 89,307.17