Finding the Fourth Proportional to 42,076.64, 63,153.84 and 21,314.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,076.64 : 63,153.84 = 21,314.72 : x
2. Step 2: Convert to fraction form
   42,076.64/63,153.84 = 21,314.72/x
3. Step 3: Cross multiply
   42,076.64x = 63,153.84 × 21,314.72
4. Step 4: Simplify right side
   42,076.64x = 1,346,106,416.52
5. Step 5: Solve for x
   x = 1,346,106,416.52/42,076.64
6. Step 6: Final answer
   x = 31,991.78