Finding the Fourth Proportional to 838,710.86, 1,257,016.52 and 660,514.10

Step by Step Solution

1. Step 1: Write the proportion equation
   838,710.86 : 1,257,016.52 = 660,514.10 : x
2. Step 2: Convert to fraction form
   838,710.86/1,257,016.52 = 660,514.10/x
3. Step 3: Cross multiply
   838,710.86x = 1,257,016.52 × 660,514.10
4. Step 4: Simplify right side
   838,710.86x = 830,277,130,759.14
5. Step 5: Solve for x
   x = 830,277,130,759.14/838,710.86
6. Step 6: Final answer
   x = 989,944.42