Finding the Fourth Proportional to 100,985.33, 139,360.73 and 55,665.06

Step by Step Solution

1. Step 1: Write the proportion equation
   100,985.33 : 139,360.73 = 55,665.06 : x
2. Step 2: Convert to fraction form
   100,985.33/139,360.73 = 55,665.06/x
3. Step 3: Cross multiply
   100,985.33x = 139,360.73 × 55,665.06
4. Step 4: Simplify right side
   100,985.33x = 7,757,523,118.77
5. Step 5: Solve for x
   x = 7,757,523,118.77/100,985.33
6. Step 6: Final answer
   x = 76,818.32