Finding the Fourth Proportional to 331,978.29, 458,099.28 and 188,710.35

Step by Step Solution

1. Step 1: Write the proportion equation
   331,978.29 : 458,099.28 = 188,710.35 : x
2. Step 2: Convert to fraction form
   331,978.29/458,099.28 = 188,710.35/x
3. Step 3: Cross multiply
   331,978.29x = 458,099.28 × 188,710.35
4. Step 4: Simplify right side
   331,978.29x = 86,448,075,463.55
5. Step 5: Solve for x
   x = 86,448,075,463.55/331,978.29
6. Step 6: Final answer
   x = 260,402.80