Finding the Fourth Proportional to 30,495, 45,695.25 and 21,153.18

Step by Step Solution

1. Step 1: Write the proportion equation
   30,495 : 45,695.25 = 21,153.18 : x
2. Step 2: Convert to fraction form
   30,495/45,695.25 = 21,153.18/x
3. Step 3: Cross multiply
   30,495x = 45,695.25 × 21,153.18
4. Step 4: Simplify right side
   30,495x = 966,599,848.40
5. Step 5: Solve for x
   x = 966,599,848.40/30,495
6. Step 6: Final answer
   x = 31,696.99