Finding the Fourth Proportional to 1,760,978.16, 2,641,870.62 and 639,047.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,760,978.16 : 2,641,870.62 = 639,047.16 : x
2. Step 2: Convert to fraction form
   1,760,978.16/2,641,870.62 = 639,047.16/x
3. Step 3: Cross multiply
   1,760,978.16x = 2,641,870.62 × 639,047.16
4. Step 4: Simplify right side
   1,760,978.16x = 1,688,279,916,798.44
5. Step 5: Solve for x
   x = 1,688,279,916,798.44/1,760,978.16
6. Step 6: Final answer
   x = 958,717.12