Finding the Fourth Proportional to 2,660,420.48, 3,991,006.56 and 862,700

Step by Step Solution

1. Step 1: Write the proportion equation
   2,660,420.48 : 3,991,006.56 = 862,700 : x
2. Step 2: Convert to fraction form
   2,660,420.48/3,991,006.56 = 862,700/x
3. Step 3: Cross multiply
   2,660,420.48x = 3,991,006.56 × 862,700
4. Step 4: Simplify right side
   2,660,420.48x = 3,443,041,359,312
5. Step 5: Solve for x
   x = 3,443,041,359,312/2,660,420.48
6. Step 6: Final answer
   x = 1,294,171.87