Finding the Fourth Proportional to 115,848.38, 159,885.69 and 64,880.48

Step by Step Solution

1. Step 1: Write the proportion equation
   115,848.38 : 159,885.69 = 64,880.48 : x
2. Step 2: Convert to fraction form
   115,848.38/159,885.69 = 64,880.48/x
3. Step 3: Cross multiply
   115,848.38x = 159,885.69 × 64,880.48
4. Step 4: Simplify right side
   115,848.38x = 10,373,460,312.33
5. Step 5: Solve for x
   x = 10,373,460,312.33/115,848.38
6. Step 6: Final answer
   x = 89,543.42