Finding the Fourth Proportional to 1,105,066.16, 1,525,126.32 and 621,651.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105,066.16 : 1,525,126.32 = 621,651.68 : x
2. Step 2: Convert to fraction form
   1,105,066.16/1,525,126.32 = 621,651.68/x
3. Step 3: Cross multiply
   1,105,066.16x = 1,525,126.32 × 621,651.68
4. Step 4: Simplify right side
   1,105,066.16x = 948,097,339,040.22
5. Step 5: Solve for x
   x = 948,097,339,040.22/1,105,066.16
6. Step 6: Final answer
   x = 857,955.27