Finding the Fourth Proportional to 1,661,128.98, 2,292,393.60 and 926,128.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,661,128.98 : 2,292,393.60 = 926,128.50 : x
2. Step 2: Convert to fraction form
   1,661,128.98/2,292,393.60 = 926,128.50/x
3. Step 3: Cross multiply
   1,661,128.98x = 2,292,393.60 × 926,128.50
4. Step 4: Simplify right side
   1,661,128.98x = 2,123,051,046,177.60
5. Step 5: Solve for x
   x = 2,123,051,046,177.60/1,661,128.98
6. Step 6: Final answer
   x = 1,278,077.18