Finding the Fourth Proportional to 261,818.50, 392,361.59 and 141,615.86

Step by Step Solution

1. Step 1: Write the proportion equation
   261,818.50 : 392,361.59 = 141,615.86 : x
2. Step 2: Convert to fraction form
   261,818.50/392,361.59 = 141,615.86/x
3. Step 3: Cross multiply
   261,818.50x = 392,361.59 × 141,615.86
4. Step 4: Simplify right side
   261,818.50x = 55,564,623,998.82
5. Step 5: Solve for x
   x = 55,564,623,998.82/261,818.50
6. Step 6: Final answer
   x = 212,225.74