Finding the Fourth Proportional to 42,010.64, 63,054.84 and 21,248.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,010.64 : 63,054.84 = 21,248.72 : x
2. Step 2: Convert to fraction form
   42,010.64/63,054.84 = 21,248.72/x
3. Step 3: Cross multiply
   42,010.64x = 63,054.84 × 21,248.72
4. Step 4: Simplify right side
   42,010.64x = 1,339,834,639.80
5. Step 5: Solve for x
   x = 1,339,834,639.80/42,010.64
6. Step 6: Final answer
   x = 31,892.75