Finding the Fourth Proportional to 78,189.12, 117,341.76 and 43,158.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,189.12 : 117,341.76 = 43,158.72 : x
2. Step 2: Convert to fraction form
   78,189.12/117,341.76 = 43,158.72/x
3. Step 3: Cross multiply
   78,189.12x = 117,341.76 × 43,158.72
4. Step 4: Simplify right side
   78,189.12x = 5,064,320,164.15
5. Step 5: Solve for x
   x = 5,064,320,164.15/78,189.12
6. Step 6: Final answer
   x = 64,770.14