Finding the Fourth Proportional to 2,580,383.52, 3,870,487.62 and 661,313.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,580,383.52 : 3,870,487.62 = 661,313.58 : x
2. Step 2: Convert to fraction form
   2,580,383.52/3,870,487.62 = 661,313.58/x
3. Step 3: Cross multiply
   2,580,383.52x = 3,870,487.62 × 661,313.58
4. Step 4: Simplify right side
   2,580,383.52x = 2,559,606,012,293.48
5. Step 5: Solve for x
   x = 2,559,606,012,293.48/2,580,383.52
6. Step 6: Final answer
   x = 991,947.90