Finding the Fourth Proportional to 427,900.58, 590,500.74 and 231,667.18

Step by Step Solution

1. Step 1: Write the proportion equation
   427,900.58 : 590,500.74 = 231,667.18 : x
2. Step 2: Convert to fraction form
   427,900.58/590,500.74 = 231,667.18/x
3. Step 3: Cross multiply
   427,900.58x = 590,500.74 × 231,667.18
4. Step 4: Simplify right side
   427,900.58x = 136,799,641,223.71
5. Step 5: Solve for x
   x = 136,799,641,223.71/427,900.58
6. Step 6: Final answer
   x = 319,699.59