Finding the Fourth Proportional to 421,086.02, 581,157.98 and 268,075.30

Step by Step Solution

1. Step 1: Write the proportion equation
   421,086.02 : 581,157.98 = 268,075.30 : x
2. Step 2: Convert to fraction form
   421,086.02/581,157.98 = 268,075.30/x
3. Step 3: Cross multiply
   421,086.02x = 581,157.98 × 268,075.30
4. Step 4: Simplify right side
   421,086.02x = 155,794,099,835.89
5. Step 5: Solve for x
   x = 155,794,099,835.89/421,086.02
6. Step 6: Final answer
   x = 369,981.65