Finding the Fourth Proportional to 1,155,300.58, 1,594,192.10 and 638,972.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155,300.58 : 1,594,192.10 = 638,972.43 : x
2. Step 2: Convert to fraction form
   1,155,300.58/1,594,192.10 = 638,972.43/x
3. Step 3: Cross multiply
   1,155,300.58x = 1,594,192.10 × 638,972.43
4. Step 4: Simplify right side
   1,155,300.58x = 1,018,644,800,023.80
5. Step 5: Solve for x
   x = 1,018,644,800,023.80/1,155,300.58
6. Step 6: Final answer
   x = 881,714.09