Finding the Fourth Proportional to 439,903, 607,066.14 and 238,699

Step by Step Solution

1. Step 1: Write the proportion equation
   439,903 : 607,066.14 = 238,699 : x
2. Step 2: Convert to fraction form
   439,903/607,066.14 = 238,699/x
3. Step 3: Cross multiply
   439,903x = 607,066.14 × 238,699
4. Step 4: Simplify right side
   439,903x = 144,906,080,551.86
5. Step 5: Solve for x
   x = 144,906,080,551.86/439,903
6. Step 6: Final answer
   x = 329,404.62