Finding the Fourth Proportional to 392,665.34, 542,151.69 and 263,800.01

Step by Step Solution

1. Step 1: Write the proportion equation
   392,665.34 : 542,151.69 = 263,800.01 : x
2. Step 2: Convert to fraction form
   392,665.34/542,151.69 = 263,800.01/x
3. Step 3: Cross multiply
   392,665.34x = 542,151.69 × 263,800.01
4. Step 4: Simplify right side
   392,665.34x = 143,019,621,243.52
5. Step 5: Solve for x
   x = 143,019,621,243.52/392,665.34
6. Step 6: Final answer
   x = 364,227.77