Finding the Fourth Proportional to 74,990.89, 103,513.49 and 43,172.47

Step by Step Solution

1. Step 1: Write the proportion equation
   74,990.89 : 103,513.49 = 43,172.47 : x
2. Step 2: Convert to fraction form
   74,990.89/103,513.49 = 43,172.47/x
3. Step 3: Cross multiply
   74,990.89x = 103,513.49 × 43,172.47
4. Step 4: Simplify right side
   74,990.89x = 4,468,933,408.34
5. Step 5: Solve for x
   x = 4,468,933,408.34/74,990.89
6. Step 6: Final answer
   x = 59,593.02