Finding the Fourth Proportional to 78,082.38, 107,641.71 and 55,687.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,082.38 : 107,641.71 = 55,687.50 : x
2. Step 2: Convert to fraction form
   78,082.38/107,641.71 = 55,687.50/x
3. Step 3: Cross multiply
   78,082.38x = 107,641.71 × 55,687.50
4. Step 4: Simplify right side
   78,082.38x = 5,994,297,725.63
5. Step 5: Solve for x
   x = 5,994,297,725.63/78,082.38
6. Step 6: Final answer
   x = 76,768.89