Finding the Fourth Proportional to 111,471.66, 153,820.71 and 66,141.84

Step by Step Solution

1. Step 1: Write the proportion equation
   111,471.66 : 153,820.71 = 66,141.84 : x
2. Step 2: Convert to fraction form
   111,471.66/153,820.71 = 66,141.84/x
3. Step 3: Cross multiply
   111,471.66x = 153,820.71 × 66,141.84
4. Step 4: Simplify right side
   111,471.66x = 10,173,984,789.51
5. Step 5: Solve for x
   x = 10,173,984,789.51/111,471.66
6. Step 6: Final answer
   x = 91,269.70