Finding the Fourth Proportional to 1,257,002.78, 1,734,657.28 and 684,047.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,257,002.78 : 1,734,657.28 = 684,047.05 : x
2. Step 2: Convert to fraction form
   1,257,002.78/1,734,657.28 = 684,047.05/x
3. Step 3: Cross multiply
   1,257,002.78x = 1,734,657.28 × 684,047.05
4. Step 4: Simplify right side
   1,257,002.78x = 1,186,587,200,333.17
5. Step 5: Solve for x
   x = 1,186,587,200,333.17/1,257,002.78
6. Step 6: Final answer
   x = 943,981.36