Finding the Fourth Proportional to 42,100.73, 63,117.99 and 21,029.90

Step by Step Solution

1. Step 1: Write the proportion equation
   42,100.73 : 63,117.99 = 21,029.90 : x
2. Step 2: Convert to fraction form
   42,100.73/63,117.99 = 21,029.90/x
3. Step 3: Cross multiply
   42,100.73x = 63,117.99 × 21,029.90
4. Step 4: Simplify right side
   42,100.73x = 1,327,365,017.90
5. Step 5: Solve for x
   x = 1,327,365,017.90/42,100.73
6. Step 6: Final answer
   x = 31,528.31