Finding the Fourth Proportional to 145,978.32, 218,948.60 and 46,148.56

Step by Step Solution

1. Step 1: Write the proportion equation
   145,978.32 : 218,948.60 = 46,148.56 : x
2. Step 2: Convert to fraction form
   145,978.32/218,948.60 = 46,148.56/x
3. Step 3: Cross multiply
   145,978.32x = 218,948.60 × 46,148.56
4. Step 4: Simplify right side
   145,978.32x = 10,104,162,604.02
5. Step 5: Solve for x
   x = 10,104,162,604.02/145,978.32
6. Step 6: Final answer
   x = 69,216.87