Finding the Fourth Proportional to 563,456.48, 845,215.56 and 142,736

Step by Step Solution

1. Step 1: Write the proportion equation
   563,456.48 : 845,215.56 = 142,736 : x
2. Step 2: Convert to fraction form
   563,456.48/845,215.56 = 142,736/x
3. Step 3: Cross multiply
   563,456.48x = 845,215.56 × 142,736
4. Step 4: Simplify right side
   563,456.48x = 120,642,688,172.16
5. Step 5: Solve for x
   x = 120,642,688,172.16/563,456.48
6. Step 6: Final answer
   x = 214,111.81