Finding the Fourth Proportional to 443,577.72, 611,499.88 and 316,031.88

Step by Step Solution

1. Step 1: Write the proportion equation
   443,577.72 : 611,499.88 = 316,031.88 : x
2. Step 2: Convert to fraction form
   443,577.72/611,499.88 = 316,031.88/x
3. Step 3: Cross multiply
   443,577.72x = 611,499.88 × 316,031.88
4. Step 4: Simplify right side
   443,577.72x = 193,253,456,696.17
5. Step 5: Solve for x
   x = 193,253,456,696.17/443,577.72
6. Step 6: Final answer
   x = 435,669.89