Finding the Fourth Proportional to 35,399.90, 48,841.98 and 21,971.72

Step by Step Solution

1. Step 1: Write the proportion equation
   35,399.90 : 48,841.98 = 21,971.72 : x
2. Step 2: Convert to fraction form
   35,399.90/48,841.98 = 21,971.72/x
3. Step 3: Cross multiply
   35,399.90x = 48,841.98 × 21,971.72
4. Step 4: Simplify right side
   35,399.90x = 1,073,142,308.81
5. Step 5: Solve for x
   x = 1,073,142,308.81/35,399.90
6. Step 6: Final answer
   x = 30,314.84