Finding the Fourth Proportional to 109,678.71, 151,366.84 and 66,648.27

Step by Step Solution

1. Step 1: Write the proportion equation
   109,678.71 : 151,366.84 = 66,648.27 : x
2. Step 2: Convert to fraction form
   109,678.71/151,366.84 = 66,648.27/x
3. Step 3: Cross multiply
   109,678.71x = 151,366.84 × 66,648.27
4. Step 4: Simplify right side
   109,678.71x = 10,088,338,021.37
5. Step 5: Solve for x
   x = 10,088,338,021.37/109,678.71
6. Step 6: Final answer
   x = 91,980.82