Finding the Fourth Proportional to 100,941.72, 139,305.88 and 55,619.68

Step by Step Solution

1. Step 1: Write the proportion equation
   100,941.72 : 139,305.88 = 55,619.68 : x
2. Step 2: Convert to fraction form
   100,941.72/139,305.88 = 55,619.68/x
3. Step 3: Cross multiply
   100,941.72x = 139,305.88 × 55,619.68
4. Step 4: Simplify right side
   100,941.72x = 7,748,148,467.72
5. Step 5: Solve for x
   x = 7,748,148,467.72/100,941.72
6. Step 6: Final answer
   x = 76,758.63