Finding the Fourth Proportional to 342,215.48, 513,151.89 and 105,527.40

Step by Step Solution

1. Step 1: Write the proportion equation
   342,215.48 : 513,151.89 = 105,527.40 : x
2. Step 2: Convert to fraction form
   342,215.48/513,151.89 = 105,527.40/x
3. Step 3: Cross multiply
   342,215.48x = 513,151.89 × 105,527.40
4. Step 4: Simplify right side
   342,215.48x = 54,151,584,756.79
5. Step 5: Solve for x
   x = 54,151,584,756.79/342,215.48
6. Step 6: Final answer
   x = 158,238.27