Finding the Fourth Proportional to 266,566.78, 399,870.84 and 89,074.42

Step by Step Solution

1. Step 1: Write the proportion equation
   266,566.78 : 399,870.84 = 89,074.42 : x
2. Step 2: Convert to fraction form
   266,566.78/399,870.84 = 89,074.42/x
3. Step 3: Cross multiply
   266,566.78x = 399,870.84 × 89,074.42
4. Step 4: Simplify right side
   266,566.78x = 35,618,263,147.91
5. Step 5: Solve for x
   x = 35,618,263,147.91/266,566.78
6. Step 6: Final answer
   x = 133,618.54