Finding the Fourth Proportional to 100,732.89, 139,011.69 and 55,415.52

Step by Step Solution

1. Step 1: Write the proportion equation
   100,732.89 : 139,011.69 = 55,415.52 : x
2. Step 2: Convert to fraction form
   100,732.89/139,011.69 = 55,415.52/x
3. Step 3: Cross multiply
   100,732.89x = 139,011.69 × 55,415.52
4. Step 4: Simplify right side
   100,732.89x = 7,703,405,087.43
5. Step 5: Solve for x
   x = 7,703,405,087.43/100,732.89
6. Step 6: Final answer
   x = 76,473.58