Finding the Fourth Proportional to 1,171,164.09, 1,616,027.72 and 661,680.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,171,164.09 : 1,616,027.72 = 661,680.57 : x
2. Step 2: Convert to fraction form
   1,171,164.09/1,616,027.72 = 661,680.57/x
3. Step 3: Cross multiply
   1,171,164.09x = 1,616,027.72 × 661,680.57
4. Step 4: Simplify right side
   1,171,164.09x = 1,069,294,139,597.00
5. Step 5: Solve for x
   x = 1,069,294,139,597.00/1,171,164.09
6. Step 6: Final answer
   x = 913,018.21