Finding the Fourth Proportional to 1,267,080.04, 1,748,556.52 and 686,288.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,267,080.04 : 1,748,556.52 = 686,288.71 : x
2. Step 2: Convert to fraction form
   1,267,080.04/1,748,556.52 = 686,288.71/x
3. Step 3: Cross multiply
   1,267,080.04x = 1,748,556.52 × 686,288.71
4. Step 4: Simplify right side
   1,267,080.04x = 1,200,014,592,385.78
5. Step 5: Solve for x
   x = 1,200,014,592,385.78/1,267,080.04
6. Step 6: Final answer
   x = 947,070.87