Finding the Fourth Proportional to 400,541.86, 552,748.89 and 221,693.86

Step by Step Solution

1. Step 1: Write the proportion equation
   400,541.86 : 552,748.89 = 221,693.86 : x
2. Step 2: Convert to fraction form
   400,541.86/552,748.89 = 221,693.86/x
3. Step 3: Cross multiply
   400,541.86x = 552,748.89 × 221,693.86
4. Step 4: Simplify right side
   400,541.86x = 122,541,035,034.82
5. Step 5: Solve for x
   x = 122,541,035,034.82/400,541.86
6. Step 6: Final answer
   x = 305,938.15