Finding the Fourth Proportional to 47,428.34, 71,146.69 and 12,368.30

Step by Step Solution

1. Step 1: Write the proportion equation
   47,428.34 : 71,146.69 = 12,368.30 : x
2. Step 2: Convert to fraction form
   47,428.34/71,146.69 = 12,368.30/x
3. Step 3: Cross multiply
   47,428.34x = 71,146.69 × 12,368.30
4. Step 4: Simplify right side
   47,428.34x = 879,963,219.27
5. Step 5: Solve for x
   x = 879,963,219.27/47,428.34
6. Step 6: Final answer
   x = 18,553.53