Finding the Fourth Proportional to 89,975, 134,972.30 and 55,138.52

Step by Step Solution

1. Step 1: Write the proportion equation
   89,975 : 134,972.30 = 55,138.52 : x
2. Step 2: Convert to fraction form
   89,975/134,972.30 = 55,138.52/x
3. Step 3: Cross multiply
   89,975x = 134,972.30 × 55,138.52
4. Step 4: Simplify right side
   89,975x = 7,442,172,863.00
5. Step 5: Solve for x
   x = 7,442,172,863.00/89,975
6. Step 6: Final answer
   x = 82,713.79