Finding the Fourth Proportional to 42,963.77, 64,437.31 and 21,610.80

Step by Step Solution

1. Step 1: Write the proportion equation
   42,963.77 : 64,437.31 = 21,610.80 : x
2. Step 2: Convert to fraction form
   42,963.77/64,437.31 = 21,610.80/x
3. Step 3: Cross multiply
   42,963.77x = 64,437.31 × 21,610.80
4. Step 4: Simplify right side
   42,963.77x = 1,392,541,845.96
5. Step 5: Solve for x
   x = 1,392,541,845.96/42,963.77
6. Step 6: Final answer
   x = 32,412.00