Finding the Fourth Proportional to 378,667.22, 522,533.86 and 213,119.34

Step by Step Solution

1. Step 1: Write the proportion equation
   378,667.22 : 522,533.86 = 213,119.34 : x
2. Step 2: Convert to fraction form
   378,667.22/522,533.86 = 213,119.34/x
3. Step 3: Cross multiply
   378,667.22x = 522,533.86 × 213,119.34
4. Step 4: Simplify right side
   378,667.22x = 111,362,071,370.85
5. Step 5: Solve for x
   x = 111,362,071,370.85/378,667.22
6. Step 6: Final answer
   x = 294,089.55