Finding the Fourth Proportional to 115,892.79, 159,894.59 and 64,897.89

Step by Step Solution

1. Step 1: Write the proportion equation
   115,892.79 : 159,894.59 = 64,897.89 : x
2. Step 2: Convert to fraction form
   115,892.79/159,894.59 = 64,897.89/x
3. Step 3: Cross multiply
   115,892.79x = 159,894.59 × 64,897.89
4. Step 4: Simplify right side
   115,892.79x = 10,376,821,188.93
5. Step 5: Solve for x
   x = 10,376,821,188.93/115,892.79
6. Step 6: Final answer
   x = 89,538.11