Finding the Fourth Proportional to 90,979.56, 136,532.64 and 37,671.80

Step by Step Solution

1. Step 1: Write the proportion equation
   90,979.56 : 136,532.64 = 37,671.80 : x
2. Step 2: Convert to fraction form
   90,979.56/136,532.64 = 37,671.80/x
3. Step 3: Cross multiply
   90,979.56x = 136,532.64 × 37,671.80
4. Step 4: Simplify right side
   90,979.56x = 5,143,429,624.89
5. Step 5: Solve for x
   x = 5,143,429,624.89/90,979.56
6. Step 6: Final answer
   x = 56,533.90