Finding the Fourth Proportional to 87,780.06, 131,411.61 and 54,392.82

Step by Step Solution

1. Step 1: Write the proportion equation
   87,780.06 : 131,411.61 = 54,392.82 : x
2. Step 2: Convert to fraction form
   87,780.06/131,411.61 = 54,392.82/x
3. Step 3: Cross multiply
   87,780.06x = 131,411.61 × 54,392.82
4. Step 4: Simplify right side
   87,780.06x = 7,147,848,048.64
5. Step 5: Solve for x
   x = 7,147,848,048.64/87,780.06
6. Step 6: Final answer
   x = 81,429.06