Finding the Fourth Proportional to 115,681.56, 159,648.69 and 64,699.04

Step by Step Solution

1. Step 1: Write the proportion equation
   115,681.56 : 159,648.69 = 64,699.04 : x
2. Step 2: Convert to fraction form
   115,681.56/159,648.69 = 64,699.04/x
3. Step 3: Cross multiply
   115,681.56x = 159,648.69 × 64,699.04
4. Step 4: Simplify right side
   115,681.56x = 10,329,116,182.01
5. Step 5: Solve for x
   x = 10,329,116,182.01/115,681.56
6. Step 6: Final answer
   x = 89,289.22