Finding the Fourth Proportional to 443,577.71, 611,499.89 and 316,031.87

Step by Step Solution

1. Step 1: Write the proportion equation
   443,577.71 : 611,499.89 = 316,031.87 : x
2. Step 2: Convert to fraction form
   443,577.71/611,499.89 = 316,031.87/x
3. Step 3: Cross multiply
   443,577.71x = 611,499.89 × 316,031.87
4. Step 4: Simplify right side
   443,577.71x = 193,253,453,741.49
5. Step 5: Solve for x
   x = 193,253,453,741.49/443,577.71
6. Step 6: Final answer
   x = 435,669.89