Finding the Fourth Proportional to 1,562,990.24, 2,155,906.32 and 989,432.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,562,990.24 : 2,155,906.32 = 989,432.48 : x
2. Step 2: Convert to fraction form
   1,562,990.24/2,155,906.32 = 989,432.48/x
3. Step 3: Cross multiply
   1,562,990.24x = 2,155,906.32 × 989,432.48
4. Step 4: Simplify right side
   1,562,990.24x = 2,133,123,736,845.27
5. Step 5: Solve for x
   x = 2,133,123,736,845.27/1,562,990.24
6. Step 6: Final answer
   x = 1,364,770.99