Finding the Fourth Proportional to 17,993,406.10, 26,990,109.15 and 17,993,406.10

Step by Step Solution

1. Step 1: Write the proportion equation
   17,993,406.10 : 26,990,109.15 = 17,993,406.10 : x
2. Step 2: Convert to fraction form
   17,993,406.10/26,990,109.15 = 17,993,406.10/x
3. Step 3: Cross multiply
   17,993,406.10x = 26,990,109.15 × 17,993,406.10
4. Step 4: Simplify right side
   17,993,406.10x = 485,643,994,619,275.81
5. Step 5: Solve for x
   x = 485,643,994,619,275.81/17,993,406.10
6. Step 6: Final answer
   x = 26,990,109.15