Finding the Fourth Proportional to 1,111,923.72, 1,534,443.54 and 621,888.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111,923.72 : 1,534,443.54 = 621,888.08 : x
2. Step 2: Convert to fraction form
   1,111,923.72/1,534,443.54 = 621,888.08/x
3. Step 3: Cross multiply
   1,111,923.72x = 1,534,443.54 × 621,888.08
4. Step 4: Simplify right side
   1,111,923.72x = 954,252,146,959.00
5. Step 5: Solve for x
   x = 954,252,146,959.00/1,111,923.72
6. Step 6: Final answer
   x = 858,199.29