Finding the Fourth Proportional to 42,949.19, 64,429.86 and 13,370.01

Step by Step Solution

1. Step 1: Write the proportion equation
   42,949.19 : 64,429.86 = 13,370.01 : x
2. Step 2: Convert to fraction form
   42,949.19/64,429.86 = 13,370.01/x
3. Step 3: Cross multiply
   42,949.19x = 64,429.86 × 13,370.01
4. Step 4: Simplify right side
   42,949.19x = 861,427,805.65
5. Step 5: Solve for x
   x = 861,427,805.65/42,949.19
6. Step 6: Final answer
   x = 20,056.91