Finding the Fourth Proportional to 1,141,145.12, 1,574,799.60 and 624,890.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,141,145.12 : 1,574,799.60 = 624,890.72 : x
2. Step 2: Convert to fraction form
   1,141,145.12/1,574,799.60 = 624,890.72/x
3. Step 3: Cross multiply
   1,141,145.12x = 1,574,799.60 × 624,890.72
4. Step 4: Simplify right side
   1,141,145.12x = 984,077,655,899.71
5. Step 5: Solve for x
   x = 984,077,655,899.71/1,141,145.12
6. Step 6: Final answer
   x = 862,359.78