Finding the Fourth Proportional to 1,140,863.76, 1,574,410.72 and 624,609.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,140,863.76 : 1,574,410.72 = 624,609.12 : x
2. Step 2: Convert to fraction form
   1,140,863.76/1,574,410.72 = 624,609.12/x
3. Step 3: Cross multiply
   1,140,863.76x = 1,574,410.72 × 624,609.12
4. Step 4: Simplify right side
   1,140,863.76x = 983,391,294,337.77
5. Step 5: Solve for x
   x = 983,391,294,337.77/1,140,863.76
6. Step 6: Final answer
   x = 861,970.84