Finding the Fourth Proportional to 1,153,131.94, 1,728,713.76 and 815,109.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,153,131.94 : 1,728,713.76 = 815,109.22 : x
2. Step 2: Convert to fraction form
   1,153,131.94/1,728,713.76 = 815,109.22/x
3. Step 3: Cross multiply
   1,153,131.94x = 1,728,713.76 × 815,109.22
4. Step 4: Simplify right side
   1,153,131.94x = 1,409,090,524,516.87
5. Step 5: Solve for x
   x = 1,409,090,524,516.87/1,153,131.94
6. Step 6: Final answer
   x = 1,221,968.17