Finding the Fourth Proportional to 402,215.42, 602,404.59 and 192,000.98

Step by Step Solution

1. Step 1: Write the proportion equation
   402,215.42 : 602,404.59 = 192,000.98 : x
2. Step 2: Convert to fraction form
   402,215.42/602,404.59 = 192,000.98/x
3. Step 3: Cross multiply
   402,215.42x = 602,404.59 × 192,000.98
4. Step 4: Simplify right side
   402,215.42x = 115,662,271,636.50
5. Step 5: Solve for x
   x = 115,662,271,636.50/402,215.42
6. Step 6: Final answer
   x = 287,563.00