Finding the Fourth Proportional to 42,665.64, 64,005.90 and 14,588.51

Step by Step Solution

1. Step 1: Write the proportion equation
   42,665.64 : 64,005.90 = 14,588.51 : x
2. Step 2: Convert to fraction form
   42,665.64/64,005.90 = 14,588.51/x
3. Step 3: Cross multiply
   42,665.64x = 64,005.90 × 14,588.51
4. Step 4: Simplify right side
   42,665.64x = 933,750,337.47
5. Step 5: Solve for x
   x = 933,750,337.47/42,665.64
6. Step 6: Final answer
   x = 21,885.30