Finding the Fourth Proportional to 1,443,113.25, 1,991,706.47 and 831,146.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443,113.25 : 1,991,706.47 = 831,146.91 : x
2. Step 2: Convert to fraction form
   1,443,113.25/1,991,706.47 = 831,146.91/x
3. Step 3: Cross multiply
   1,443,113.25x = 1,991,706.47 × 831,146.91
4. Step 4: Simplify right side
   1,443,113.25x = 1,655,400,669,659.67
5. Step 5: Solve for x
   x = 1,655,400,669,659.67/1,443,113.25
6. Step 6: Final answer
   x = 1,147,103.79