Finding the Fourth Proportional to 1,260,742.17, 1,739,816.12 and 716,878.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,260,742.17 : 1,739,816.12 = 716,878.10 : x
2. Step 2: Convert to fraction form
   1,260,742.17/1,739,816.12 = 716,878.10/x
3. Step 3: Cross multiply
   1,260,742.17x = 1,739,816.12 × 716,878.10
4. Step 4: Simplify right side
   1,260,742.17x = 1,247,236,062,171.50
5. Step 5: Solve for x
   x = 1,247,236,062,171.50/1,260,742.17
6. Step 6: Final answer
   x = 989,287.18