Finding the Fourth Proportional to 115,271.31, 159,075.63 and 64,970.31

Step by Step Solution

1. Step 1: Write the proportion equation
   115,271.31 : 159,075.63 = 64,970.31 : x
2. Step 2: Convert to fraction form
   115,271.31/159,075.63 = 64,970.31/x
3. Step 3: Cross multiply
   115,271.31x = 159,075.63 × 64,970.31
4. Step 4: Simplify right side
   115,271.31x = 10,335,192,994.55
5. Step 5: Solve for x
   x = 10,335,192,994.55/115,271.31
6. Step 6: Final answer
   x = 89,659.72