Finding the Fourth Proportional to 309,978.32, 427,769.86 and 174,012.53

Step by Step Solution

1. Step 1: Write the proportion equation
   309,978.32 : 427,769.86 = 174,012.53 : x
2. Step 2: Convert to fraction form
   309,978.32/427,769.86 = 174,012.53/x
3. Step 3: Cross multiply
   309,978.32x = 427,769.86 × 174,012.53
4. Step 4: Simplify right side
   309,978.32x = 74,437,314,551.84
5. Step 5: Solve for x
   x = 74,437,314,551.84/309,978.32
6. Step 6: Final answer
   x = 240,137.17