Finding the Fourth Proportional to 1,260,860.78, 1,739,985.89 and 687,901.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,260,860.78 : 1,739,985.89 = 687,901.01 : x
2. Step 2: Convert to fraction form
   1,260,860.78/1,739,985.89 = 687,901.01/x
3. Step 3: Cross multiply
   1,260,860.78x = 1,739,985.89 × 687,901.01
4. Step 4: Simplify right side
   1,260,860.78x = 1,196,938,038,977.31
5. Step 5: Solve for x
   x = 1,196,938,038,977.31/1,260,860.78
6. Step 6: Final answer
   x = 949,302.30