Finding the Fourth Proportional to 100,808.96, 139,115.27 and 55,485.98

Step by Step Solution

1. Step 1: Write the proportion equation
   100,808.96 : 139,115.27 = 55,485.98 : x
2. Step 2: Convert to fraction form
   100,808.96/139,115.27 = 55,485.98/x
3. Step 3: Cross multiply
   100,808.96x = 139,115.27 × 55,485.98
4. Step 4: Simplify right side
   100,808.96x = 7,718,946,532.05
5. Step 5: Solve for x
   x = 7,718,946,532.05/100,808.96
6. Step 6: Final answer
   x = 76,570.04