Finding the Fourth Proportional to 139,057.50, 208,592.74 and 40,561.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,057.50 : 208,592.74 = 40,561.50 : x
2. Step 2: Convert to fraction form
   139,057.50/208,592.74 = 40,561.50/x
3. Step 3: Cross multiply
   139,057.50x = 208,592.74 × 40,561.50
4. Step 4: Simplify right side
   139,057.50x = 8,460,834,423.51
5. Step 5: Solve for x
   x = 8,460,834,423.51/139,057.50
6. Step 6: Final answer
   x = 60,844.14