Finding the Fourth Proportional to 111,475.50, 153,785.95 and 66,155.39

Step by Step Solution

1. Step 1: Write the proportion equation
   111,475.50 : 153,785.95 = 66,155.39 : x
2. Step 2: Convert to fraction form
   111,475.50/153,785.95 = 66,155.39/x
3. Step 3: Cross multiply
   111,475.50x = 153,785.95 × 66,155.39
4. Step 4: Simplify right side
   111,475.50x = 10,173,769,498.77
5. Step 5: Solve for x
   x = 10,173,769,498.77/111,475.50
6. Step 6: Final answer
   x = 91,264.62