Finding the Fourth Proportional to 115,301.37, 159,116.13 and 64,312.78

Step by Step Solution

1. Step 1: Write the proportion equation
   115,301.37 : 159,116.13 = 64,312.78 : x
2. Step 2: Convert to fraction form
   115,301.37/159,116.13 = 64,312.78/x
3. Step 3: Cross multiply
   115,301.37x = 159,116.13 × 64,312.78
4. Step 4: Simplify right side
   115,301.37x = 10,233,200,663.14
5. Step 5: Solve for x
   x = 10,233,200,663.14/115,301.37
6. Step 6: Final answer
   x = 88,751.77