Finding the Fourth Proportional to 90,978.62, 136,494.32 and 37,660.77

Step by Step Solution

1. Step 1: Write the proportion equation
   90,978.62 : 136,494.32 = 37,660.77 : x
2. Step 2: Convert to fraction form
   90,978.62/136,494.32 = 37,660.77/x
3. Step 3: Cross multiply
   90,978.62x = 136,494.32 × 37,660.77
4. Step 4: Simplify right side
   90,978.62x = 5,140,481,003.52
5. Step 5: Solve for x
   x = 5,140,481,003.52/90,978.62
6. Step 6: Final answer
   x = 56,502.08