Finding the Fourth Proportional to 424,152.81, 636,212.59 and 143,670.05

Step by Step Solution

1. Step 1: Write the proportion equation
   424,152.81 : 636,212.59 = 143,670.05 : x
2. Step 2: Convert to fraction form
   424,152.81/636,212.59 = 143,670.05/x
3. Step 3: Cross multiply
   424,152.81x = 636,212.59 × 143,670.05
4. Step 4: Simplify right side
   424,152.81x = 91,404,694,615.93
5. Step 5: Solve for x
   x = 91,404,694,615.93/424,152.81
6. Step 6: Final answer
   x = 215,499.44