Finding the Fourth Proportional to 1,287,602.79, 1,777,111.76 and 743,640.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,287,602.79 : 1,777,111.76 = 743,640.81 : x
2. Step 2: Convert to fraction form
   1,287,602.79/1,777,111.76 = 743,640.81/x
3. Step 3: Cross multiply
   1,287,602.79x = 1,777,111.76 × 743,640.81
4. Step 4: Simplify right side
   1,287,602.79x = 1,321,532,824,948.72
5. Step 5: Solve for x
   x = 1,321,532,824,948.72/1,287,602.79
6. Step 6: Final answer
   x = 1,026,351.32