Finding the Fourth Proportional to 111,303.06, 153,590.49 and 65,978.70

Step by Step Solution

1. Step 1: Write the proportion equation
   111,303.06 : 153,590.49 = 65,978.70 : x
2. Step 2: Convert to fraction form
   111,303.06/153,590.49 = 65,978.70/x
3. Step 3: Cross multiply
   111,303.06x = 153,590.49 × 65,978.70
4. Step 4: Simplify right side
   111,303.06x = 10,133,700,862.56
5. Step 5: Solve for x
   x = 10,133,700,862.56/111,303.06
6. Step 6: Final answer
   x = 91,046.02