Finding the Fourth Proportional to 115,525.69, 159,419.71 and 64,528.25

Step by Step Solution

1. Step 1: Write the proportion equation
   115,525.69 : 159,419.71 = 64,528.25 : x
2. Step 2: Convert to fraction form
   115,525.69/159,419.71 = 64,528.25/x
3. Step 3: Cross multiply
   115,525.69x = 159,419.71 × 64,528.25
4. Step 4: Simplify right side
   115,525.69x = 10,287,075,139.04
5. Step 5: Solve for x
   x = 10,287,075,139.04/115,525.69
6. Step 6: Final answer
   x = 89,045.78