Finding the Fourth Proportional to 100,670.82, 138,927.33 and 55,350.78

Step by Step Solution

1. Step 1: Write the proportion equation
   100,670.82 : 138,927.33 = 55,350.78 : x
2. Step 2: Convert to fraction form
   100,670.82/138,927.33 = 55,350.78/x
3. Step 3: Cross multiply
   100,670.82x = 138,927.33 × 55,350.78
4. Step 4: Simplify right side
   100,670.82x = 7,689,736,078.82
5. Step 5: Solve for x
   x = 7,689,736,078.82/100,670.82
6. Step 6: Final answer
   x = 76,384.96