Finding the Fourth Proportional to 78,665.59, 117,899.83 and 61,959.63

Step by Step Solution

1. Step 1: Write the proportion equation
   78,665.59 : 117,899.83 = 61,959.63 : x
2. Step 2: Convert to fraction form
   78,665.59/117,899.83 = 61,959.63/x
3. Step 3: Cross multiply
   78,665.59x = 117,899.83 × 61,959.63
4. Step 4: Simplify right side
   78,665.59x = 7,305,029,843.86
5. Step 5: Solve for x
   x = 7,305,029,843.86/78,665.59
6. Step 6: Final answer
   x = 92,861.82