Finding the Fourth Proportional to 90,979.05, 136,531.89 and 37,671.30

Step by Step Solution

1. Step 1: Write the proportion equation
   90,979.05 : 136,531.89 = 37,671.30 : x
2. Step 2: Convert to fraction form
   90,979.05/136,531.89 = 37,671.30/x
3. Step 3: Cross multiply
   90,979.05x = 136,531.89 × 37,671.30
4. Step 4: Simplify right side
   90,979.05x = 5,143,333,787.76
5. Step 5: Solve for x
   x = 5,143,333,787.76/90,979.05
6. Step 6: Final answer
   x = 56,533.17