Finding the Fourth Proportional to 1,355,298.67, 2,031,936.72 and 815,428.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,355,298.67 : 2,031,936.72 = 815,428.41 : x
2. Step 2: Convert to fraction form
   1,355,298.67/2,031,936.72 = 815,428.41/x
3. Step 3: Cross multiply
   1,355,298.67x = 2,031,936.72 × 815,428.41
4. Step 4: Simplify right side
   1,355,298.67x = 1,656,898,928,810.22
5. Step 5: Solve for x
   x = 1,656,898,928,810.22/1,355,298.67
6. Step 6: Final answer
   x = 1,222,534.17