Finding the Fourth Proportional to 78,726, 108,644.50 and 46,890.57

Step by Step Solution

1. Step 1: Write the proportion equation
   78,726 : 108,644.50 = 46,890.57 : x
2. Step 2: Convert to fraction form
   78,726/108,644.50 = 46,890.57/x
3. Step 3: Cross multiply
   78,726x = 108,644.50 × 46,890.57
4. Step 4: Simplify right side
   78,726x = 5,094,402,532.37
5. Step 5: Solve for x
   x = 5,094,402,532.37/78,726
6. Step 6: Final answer
   x = 64,710.55