Finding the Fourth Proportional to 78,533.28, 117,859.86 and 39,123.54

Step by Step Solution

1. Step 1: Write the proportion equation
   78,533.28 : 117,859.86 = 39,123.54 : x
2. Step 2: Convert to fraction form
   78,533.28/117,859.86 = 39,123.54/x
3. Step 3: Cross multiply
   78,533.28x = 117,859.86 × 39,123.54
4. Step 4: Simplify right side
   78,533.28x = 4,611,094,947.10
5. Step 5: Solve for x
   x = 4,611,094,947.10/78,533.28
6. Step 6: Final answer
   x = 58,715.17