Finding the Fourth Proportional to 90,861.83, 136,312.17 and 27,687

Step by Step Solution

1. Step 1: Write the proportion equation
   90,861.83 : 136,312.17 = 27,687 : x
2. Step 2: Convert to fraction form
   90,861.83/136,312.17 = 27,687/x
3. Step 3: Cross multiply
   90,861.83x = 136,312.17 × 27,687
4. Step 4: Simplify right side
   90,861.83x = 3,774,074,912.36
5. Step 5: Solve for x
   x = 3,774,074,912.36/90,861.83
6. Step 6: Final answer
   x = 41,536.42