Finding the Fourth Proportional to 100,758.99, 139,047.39 and 55,435.98

Step by Step Solution

1. Step 1: Write the proportion equation
   100,758.99 : 139,047.39 = 55,435.98 : x
2. Step 2: Convert to fraction form
   100,758.99/139,047.39 = 55,435.98/x
3. Step 3: Cross multiply
   100,758.99x = 139,047.39 × 55,435.98
4. Step 4: Simplify right side
   100,758.99x = 7,708,228,331.09
5. Step 5: Solve for x
   x = 7,708,228,331.09/100,758.99
6. Step 6: Final answer
   x = 76,501.64