Finding the Fourth Proportional to 42,785.10, 64,186.16 and 21,736.98

Step by Step Solution

1. Step 1: Write the proportion equation
   42,785.10 : 64,186.16 = 21,736.98 : x
2. Step 2: Convert to fraction form
   42,785.10/64,186.16 = 21,736.98/x
3. Step 3: Cross multiply
   42,785.10x = 64,186.16 × 21,736.98
4. Step 4: Simplify right side
   42,785.10x = 1,395,213,167.51
5. Step 5: Solve for x
   x = 1,395,213,167.51/42,785.10
6. Step 6: Final answer
   x = 32,609.79