Finding the Fourth Proportional to 111,456.64, 153,787.42 and 66,114.76

Step by Step Solution

1. Step 1: Write the proportion equation
   111,456.64 : 153,787.42 = 66,114.76 : x
2. Step 2: Convert to fraction form
   111,456.64/153,787.42 = 66,114.76/x
3. Step 3: Cross multiply
   111,456.64x = 153,787.42 × 66,114.76
4. Step 4: Simplify right side
   111,456.64x = 10,167,618,364.32
5. Step 5: Solve for x
   x = 10,167,618,364.32/111,456.64
6. Step 6: Final answer
   x = 91,224.88