Finding the Fourth Proportional to 100,105.68, 138,141.69 and 54,782.52

Step by Step Solution

1. Step 1: Write the proportion equation
   100,105.68 : 138,141.69 = 54,782.52 : x
2. Step 2: Convert to fraction form
   100,105.68/138,141.69 = 54,782.52/x
3. Step 3: Cross multiply
   100,105.68x = 138,141.69 × 54,782.52
4. Step 4: Simplify right side
   100,105.68x = 7,567,749,895.26
5. Step 5: Solve for x
   x = 7,567,749,895.26/100,105.68
6. Step 6: Final answer
   x = 75,597.61