Finding the Fourth Proportional to 1,270,978.75, 1,753,943.88 and 690,196.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,270,978.75 : 1,753,943.88 = 690,196.87 : x
2. Step 2: Convert to fraction form
   1,270,978.75/1,753,943.88 = 690,196.87/x
3. Step 3: Cross multiply
   1,270,978.75x = 1,753,943.88 × 690,196.87
4. Step 4: Simplify right side
   1,270,978.75x = 1,210,566,576,131.66
5. Step 5: Solve for x
   x = 1,210,566,576,131.66/1,270,978.75
6. Step 6: Final answer
   x = 952,467.99