Finding the Fourth Proportional to 42,032.64, 63,087.84 and 21,270.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,032.64 : 63,087.84 = 21,270.72 : x
2. Step 2: Convert to fraction form
   42,032.64/63,087.84 = 21,270.72/x
3. Step 3: Cross multiply
   42,032.64x = 63,087.84 × 21,270.72
4. Step 4: Simplify right side
   42,032.64x = 1,341,923,780.04
5. Step 5: Solve for x
   x = 1,341,923,780.04/42,032.64
6. Step 6: Final answer
   x = 31,925.76