Finding the Fourth Proportional to 139,423.86, 209,071.20 and 112,704.18

Step by Step Solution

1. Step 1: Write the proportion equation
   139,423.86 : 209,071.20 = 112,704.18 : x
2. Step 2: Convert to fraction form
   139,423.86/209,071.20 = 112,704.18/x
3. Step 3: Cross multiply
   139,423.86x = 209,071.20 × 112,704.18
4. Step 4: Simplify right side
   139,423.86x = 23,563,199,243.30
5. Step 5: Solve for x
   x = 23,563,199,243.30/139,423.86
6. Step 6: Final answer
   x = 169,004.07