Finding the Fourth Proportional to 90,056.72, 135,121.80 and 37,456.40

Step by Step Solution

1. Step 1: Write the proportion equation
   90,056.72 : 135,121.80 = 37,456.40 : x
2. Step 2: Convert to fraction form
   90,056.72/135,121.80 = 37,456.40/x
3. Step 3: Cross multiply
   90,056.72x = 135,121.80 × 37,456.40
4. Step 4: Simplify right side
   90,056.72x = 5,061,176,189.52
5. Step 5: Solve for x
   x = 5,061,176,189.52/90,056.72
6. Step 6: Final answer
   x = 56,199.87