Finding the Fourth Proportional to 78,533.40, 108,386.82 and 53,391

Step by Step Solution

1. Step 1: Write the proportion equation
   78,533.40 : 108,386.82 = 53,391 : x
2. Step 2: Convert to fraction form
   78,533.40/108,386.82 = 53,391/x
3. Step 3: Cross multiply
   78,533.40x = 108,386.82 × 53,391
4. Step 4: Simplify right side
   78,533.40x = 5,786,880,706.62
5. Step 5: Solve for x
   x = 5,786,880,706.62/78,533.40
6. Step 6: Final answer
   x = 73,686.87