Finding the Fourth Proportional to 1,152,522.32, 1,590,481.86 and 643,224.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,152,522.32 : 1,590,481.86 = 643,224.56 : x
2. Step 2: Convert to fraction form
   1,152,522.32/1,590,481.86 = 643,224.56/x
3. Step 3: Cross multiply
   1,152,522.32x = 1,590,481.86 × 643,224.56
4. Step 4: Simplify right side
   1,152,522.32x = 1,023,036,994,586.48
5. Step 5: Solve for x
   x = 1,023,036,994,586.48/1,152,522.32
6. Step 6: Final answer
   x = 887,650.48