Finding the Fourth Proportional to 1,202,938.10, 1,659,843.59 and 686,456.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,202,938.10 : 1,659,843.59 = 686,456.18 : x
2. Step 2: Convert to fraction form
   1,202,938.10/1,659,843.59 = 686,456.18/x
3. Step 3: Cross multiply
   1,202,938.10x = 1,659,843.59 × 686,456.18
4. Step 4: Simplify right side
   1,202,938.10x = 1,139,409,878,457.39
5. Step 5: Solve for x
   x = 1,139,409,878,457.39/1,202,938.10
6. Step 6: Final answer
   x = 947,189.12