Finding the Fourth Proportional to 223,417.10, 308,315.00 and 121,442.55

Step by Step Solution

1. Step 1: Write the proportion equation
   223,417.10 : 308,315.00 = 121,442.55 : x
2. Step 2: Convert to fraction form
   223,417.10/308,315.00 = 121,442.55/x
3. Step 3: Cross multiply
   223,417.10x = 308,315.00 × 121,442.55
4. Step 4: Simplify right side
   223,417.10x = 37,442,559,196.04
5. Step 5: Solve for x
   x = 37,442,559,196.04/223,417.10
6. Step 6: Final answer
   x = 167,590.39