Finding the Fourth Proportional to 139,461.90, 209,172.33 and 45,955.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,461.90 : 209,172.33 = 45,955.50 : x
2. Step 2: Convert to fraction form
   139,461.90/209,172.33 = 45,955.50/x
3. Step 3: Cross multiply
   139,461.90x = 209,172.33 × 45,955.50
4. Step 4: Simplify right side
   139,461.90x = 9,612,619,011.32
5. Step 5: Solve for x
   x = 9,612,619,011.32/139,461.90
6. Step 6: Final answer
   x = 68,926.49