Finding the Fourth Proportional to 115,881.03, 159,902.61 and 64,886.67

Step by Step Solution

1. Step 1: Write the proportion equation
   115,881.03 : 159,902.61 = 64,886.67 : x
2. Step 2: Convert to fraction form
   115,881.03/159,902.61 = 64,886.67/x
3. Step 3: Cross multiply
   115,881.03x = 159,902.61 × 64,886.67
4. Step 4: Simplify right side
   115,881.03x = 10,375,547,643.88
5. Step 5: Solve for x
   x = 10,375,547,643.88/115,881.03
6. Step 6: Final answer
   x = 89,536.20