Finding the Fourth Proportional to 52,305, 78,474.78 and 21,123.24

Step by Step Solution

1. Step 1: Write the proportion equation
   52,305 : 78,474.78 = 21,123.24 : x
2. Step 2: Convert to fraction form
   52,305/78,474.78 = 21,123.24/x
3. Step 3: Cross multiply
   52,305x = 78,474.78 × 21,123.24
4. Step 4: Simplify right side
   52,305x = 1,657,641,611.89
5. Step 5: Solve for x
   x = 1,657,641,611.89/52,305
6. Step 6: Final answer
   x = 31,691.84