Finding the Fourth Proportional to 545,636.88, 753,016.72 and 330,786

Step by Step Solution

1. Step 1: Write the proportion equation
   545,636.88 : 753,016.72 = 330,786 : x
2. Step 2: Convert to fraction form
   545,636.88/753,016.72 = 330,786/x
3. Step 3: Cross multiply
   545,636.88x = 753,016.72 × 330,786
4. Step 4: Simplify right side
   545,636.88x = 249,087,388,741.92
5. Step 5: Solve for x
   x = 249,087,388,741.92/545,636.88
6. Step 6: Final answer
   x = 456,507.61