Finding the Fourth Proportional to 139,819.50, 209,699.82 and 45,058.32

Step by Step Solution

1. Step 1: Write the proportion equation
   139,819.50 : 209,699.82 = 45,058.32 : x
2. Step 2: Convert to fraction form
   139,819.50/209,699.82 = 45,058.32/x
3. Step 3: Cross multiply
   139,819.50x = 209,699.82 × 45,058.32
4. Step 4: Simplify right side
   139,819.50x = 9,448,721,593.50
5. Step 5: Solve for x
   x = 9,448,721,593.50/139,819.50
6. Step 6: Final answer
   x = 67,578.00