Finding the Fourth Proportional to 42,971.64, 64,501.17 and 30,505.74

Step by Step Solution

1. Step 1: Write the proportion equation
   42,971.64 : 64,501.17 = 30,505.74 : x
2. Step 2: Convert to fraction form
   42,971.64/64,501.17 = 30,505.74/x
3. Step 3: Cross multiply
   42,971.64x = 64,501.17 × 30,505.74
4. Step 4: Simplify right side
   42,971.64x = 1,967,655,921.72
5. Step 5: Solve for x
   x = 1,967,655,921.72/42,971.64
6. Step 6: Final answer
   x = 45,789.64