Finding the Fourth Proportional to 78,312, 108,160.28 and 51,574

Step by Step Solution

1. Step 1: Write the proportion equation
   78,312 : 108,160.28 = 51,574 : x
2. Step 2: Convert to fraction form
   78,312/108,160.28 = 51,574/x
3. Step 3: Cross multiply
   78,312x = 108,160.28 × 51,574
4. Step 4: Simplify right side
   78,312x = 5,578,258,280.72
5. Step 5: Solve for x
   x = 5,578,258,280.72/78,312
6. Step 6: Final answer
   x = 71,231.21