Finding the Fourth Proportional to 42,099, 63,141.48 and 21,016.68

Step by Step Solution

1. Step 1: Write the proportion equation
   42,099 : 63,141.48 = 21,016.68 : x
2. Step 2: Convert to fraction form
   42,099/63,141.48 = 21,016.68/x
3. Step 3: Cross multiply
   42,099x = 63,141.48 × 21,016.68
4. Step 4: Simplify right side
   42,099x = 1,327,024,279.89
5. Step 5: Solve for x
   x = 1,327,024,279.89/42,099
6. Step 6: Final answer
   x = 31,521.52