Finding the Fourth Proportional to 100,806.53, 139,111.94 and 55,483.55

Step by Step Solution

1. Step 1: Write the proportion equation
   100,806.53 : 139,111.94 = 55,483.55 : x
2. Step 2: Convert to fraction form
   100,806.53/139,111.94 = 55,483.55/x
3. Step 3: Cross multiply
   100,806.53x = 139,111.94 × 55,483.55
4. Step 4: Simplify right side
   100,806.53x = 7,718,423,721.74
5. Step 5: Solve for x
   x = 7,718,423,721.74/100,806.53
6. Step 6: Final answer
   x = 76,566.70