Finding the Fourth Proportional to 72,870.88, 109,359.60 and 46,639.84

Step by Step Solution

1. Step 1: Write the proportion equation
   72,870.88 : 109,359.60 = 46,639.84 : x
2. Step 2: Convert to fraction form
   72,870.88/109,359.60 = 46,639.84/x
3. Step 3: Cross multiply
   72,870.88x = 109,359.60 × 46,639.84
4. Step 4: Simplify right side
   72,870.88x = 5,100,514,246.46
5. Step 5: Solve for x
   x = 5,100,514,246.46/72,870.88
6. Step 6: Final answer
   x = 69,993.86