Finding the Fourth Proportional to 521,532.82, 782,172.78 and 142,455.31

Step by Step Solution

1. Step 1: Write the proportion equation
   521,532.82 : 782,172.78 = 142,455.31 : x
2. Step 2: Convert to fraction form
   521,532.82/782,172.78 = 142,455.31/x
3. Step 3: Cross multiply
   521,532.82x = 782,172.78 × 142,455.31
4. Step 4: Simplify right side
   521,532.82x = 111,424,665,848.46
5. Step 5: Solve for x
   x = 111,424,665,848.46/521,532.82
6. Step 6: Final answer
   x = 213,648.43