Finding the Fourth Proportional to 383,460.10, 575,449.35 and 214,980.10

Step by Step Solution

1. Step 1: Write the proportion equation
   383,460.10 : 575,449.35 = 214,980.10 : x
2. Step 2: Convert to fraction form
   383,460.10/575,449.35 = 214,980.10/x
3. Step 3: Cross multiply
   383,460.10x = 575,449.35 × 214,980.10
4. Step 4: Simplify right side
   383,460.10x = 123,710,158,807.94
5. Step 5: Solve for x
   x = 123,710,158,807.94/383,460.10
6. Step 6: Final answer
   x = 322,615.47