Finding the Fourth Proportional to 100,938.83, 139,293.74 and 55,621.01

Step by Step Solution

1. Step 1: Write the proportion equation
   100,938.83 : 139,293.74 = 55,621.01 : x
2. Step 2: Convert to fraction form
   100,938.83/139,293.74 = 55,621.01/x
3. Step 3: Cross multiply
   100,938.83x = 139,293.74 × 55,621.01
4. Step 4: Simplify right side
   100,938.83x = 7,747,658,992.76
5. Step 5: Solve for x
   x = 7,747,658,992.76/100,938.83
6. Step 6: Final answer
   x = 76,755.99