Finding the Fourth Proportional to 78,340, 108,109.20 and 43,012

Step by Step Solution

1. Step 1: Write the proportion equation
   78,340 : 108,109.20 = 43,012 : x
2. Step 2: Convert to fraction form
   78,340/108,109.20 = 43,012/x
3. Step 3: Cross multiply
   78,340x = 108,109.20 × 43,012
4. Step 4: Simplify right side
   78,340x = 4,649,992,910.40
5. Step 5: Solve for x
   x = 4,649,992,910.40/78,340
6. Step 6: Final answer
   x = 59,356.56