Finding the Fourth Proportional to 123,259.63, 170,100.54 and 72,308.92

Step by Step Solution

1. Step 1: Write the proportion equation
   123,259.63 : 170,100.54 = 72,308.92 : x
2. Step 2: Convert to fraction form
   123,259.63/170,100.54 = 72,308.92/x
3. Step 3: Cross multiply
   123,259.63x = 170,100.54 × 72,308.92
4. Step 4: Simplify right side
   123,259.63x = 12,299,786,338.82
5. Step 5: Solve for x
   x = 12,299,786,338.82/123,259.63
6. Step 6: Final answer
   x = 99,787.63