Finding the Fourth Proportional to 42,914.95, 64,386.38 and 20,730.87

Step by Step Solution

1. Step 1: Write the proportion equation
   42,914.95 : 64,386.38 = 20,730.87 : x
2. Step 2: Convert to fraction form
   42,914.95/64,386.38 = 20,730.87/x
3. Step 3: Cross multiply
   42,914.95x = 64,386.38 × 20,730.87
4. Step 4: Simplify right side
   42,914.95x = 1,334,785,725.38
5. Step 5: Solve for x
   x = 1,334,785,725.38/42,914.95
6. Step 6: Final answer
   x = 31,103.05