Finding the Fourth Proportional to 281,086.61, 387,636.64 and 223,916.00

Step by Step Solution

1. Step 1: Write the proportion equation
   281,086.61 : 387,636.64 = 223,916.00 : x
2. Step 2: Convert to fraction form
   281,086.61/387,636.64 = 223,916.00/x
3. Step 3: Cross multiply
   281,086.61x = 387,636.64 × 223,916.00
4. Step 4: Simplify right side
   281,086.61x = 86,798,043,384.27
5. Step 5: Solve for x
   x = 86,798,043,384.27/281,086.61
6. Step 6: Final answer
   x = 308,794.66