Finding the Fourth Proportional to 42,914.69, 64,386 and 20,730.61

Step by Step Solution

1. Step 1: Write the proportion equation
   42,914.69 : 64,386 = 20,730.61 : x
2. Step 2: Convert to fraction form
   42,914.69/64,386 = 20,730.61/x
3. Step 3: Cross multiply
   42,914.69x = 64,386 × 20,730.61
4. Step 4: Simplify right side
   42,914.69x = 1,334,761,055.46
5. Step 5: Solve for x
   x = 1,334,761,055.46/42,914.69
6. Step 6: Final answer
   x = 31,102.66