Finding the Fourth Proportional to 35,445.57, 48,916.54 and 21,102.15

Step by Step Solution

1. Step 1: Write the proportion equation
   35,445.57 : 48,916.54 = 21,102.15 : x
2. Step 2: Convert to fraction form
   35,445.57/48,916.54 = 21,102.15/x
3. Step 3: Cross multiply
   35,445.57x = 48,916.54 × 21,102.15
4. Step 4: Simplify right side
   35,445.57x = 1,032,244,164.56
5. Step 5: Solve for x
   x = 1,032,244,164.56/35,445.57
6. Step 6: Final answer
   x = 29,121.95