Finding the Fourth Proportional to 145,490.18, 218,085.59 and 78,789.41

Step by Step Solution

1. Step 1: Write the proportion equation
   145,490.18 : 218,085.59 = 78,789.41 : x
2. Step 2: Convert to fraction form
   145,490.18/218,085.59 = 78,789.41/x
3. Step 3: Cross multiply
   145,490.18x = 218,085.59 × 78,789.41
4. Step 4: Simplify right side
   145,490.18x = 17,182,834,668.37
5. Step 5: Solve for x
   x = 17,182,834,668.37/145,490.18
6. Step 6: Final answer
   x = 118,103.06