Finding the Fourth Proportional to 1,300,647.67, 1,951,685.54 and 661,006.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,300,647.67 : 1,951,685.54 = 661,006.57 : x
2. Step 2: Convert to fraction form
   1,300,647.67/1,951,685.54 = 661,006.57/x
3. Step 3: Cross multiply
   1,300,647.67x = 1,951,685.54 × 661,006.57
4. Step 4: Simplify right side
   1,300,647.67x = 1,290,076,964,514.00
5. Step 5: Solve for x
   x = 1,290,076,964,514.00/1,300,647.67
6. Step 6: Final answer
   x = 991,872.74