Finding the Fourth Proportional to 592,978.49, 888,536.33 and 458,372.37

Step by Step Solution

1. Step 1: Write the proportion equation
   592,978.49 : 888,536.33 = 458,372.37 : x
2. Step 2: Convert to fraction form
   592,978.49/888,536.33 = 458,372.37/x
3. Step 3: Cross multiply
   592,978.49x = 888,536.33 × 458,372.37
4. Step 4: Simplify right side
   592,978.49x = 407,280,501,121.34
5. Step 5: Solve for x
   x = 407,280,501,121.34/592,978.49
6. Step 6: Final answer
   x = 686,838.58