Finding the Fourth Proportional to 49,680.88, 74,521.86 and 14,621.20

Step by Step Solution

1. Step 1: Write the proportion equation
   49,680.88 : 74,521.86 = 14,621.20 : x
2. Step 2: Convert to fraction form
   49,680.88/74,521.86 = 14,621.20/x
3. Step 3: Cross multiply
   49,680.88x = 74,521.86 × 14,621.20
4. Step 4: Simplify right side
   49,680.88x = 1,089,599,019.43
5. Step 5: Solve for x
   x = 1,089,599,019.43/49,680.88
6. Step 6: Final answer
   x = 21,931.96