Finding the Fourth Proportional to 78,725.50, 108,643.81 and 46,890.07

Step by Step Solution

1. Step 1: Write the proportion equation
   78,725.50 : 108,643.81 = 46,890.07 : x
2. Step 2: Convert to fraction form
   78,725.50/108,643.81 = 46,890.07/x
3. Step 3: Cross multiply
   78,725.50x = 108,643.81 × 46,890.07
4. Step 4: Simplify right side
   78,725.50x = 5,094,315,312.75
5. Step 5: Solve for x
   x = 5,094,315,312.75/78,725.50
6. Step 6: Final answer
   x = 64,709.85