Finding the Fourth Proportional to 223,978.05, 309,089.70 and 123,376.05

Step by Step Solution

1. Step 1: Write the proportion equation
   223,978.05 : 309,089.70 = 123,376.05 : x
2. Step 2: Convert to fraction form
   223,978.05/309,089.70 = 123,376.05/x
3. Step 3: Cross multiply
   223,978.05x = 309,089.70 × 123,376.05
4. Step 4: Simplify right side
   223,978.05x = 38,134,266,281.69
5. Step 5: Solve for x
   x = 38,134,266,281.69/223,978.05
6. Step 6: Final answer
   x = 170,258.94