Finding the Fourth Proportional to 90,443.39, 135,687.86 and 53,034.75

Step by Step Solution

1. Step 1: Write the proportion equation
   90,443.39 : 135,687.86 = 53,034.75 : x
2. Step 2: Convert to fraction form
   90,443.39/135,687.86 = 53,034.75/x
3. Step 3: Cross multiply
   90,443.39x = 135,687.86 × 53,034.75
4. Step 4: Simplify right side
   90,443.39x = 7,196,171,666.84
5. Step 5: Solve for x
   x = 7,196,171,666.84/90,443.39
6. Step 6: Final answer
   x = 79,565.48