Finding the Fourth Proportional to 100,153.50, 138,211.83 and 55,441.50

Step by Step Solution

1. Step 1: Write the proportion equation
   100,153.50 : 138,211.83 = 55,441.50 : x
2. Step 2: Convert to fraction form
   100,153.50/138,211.83 = 55,441.50/x
3. Step 3: Cross multiply
   100,153.50x = 138,211.83 × 55,441.50
4. Step 4: Simplify right side
   100,153.50x = 7,662,671,172.95
5. Step 5: Solve for x
   x = 7,662,671,172.95/100,153.50
6. Step 6: Final answer
   x = 76,509.27