Finding the Fourth Proportional to 123,892.74, 170,955.36 and 72,900

Step by Step Solution

1. Step 1: Write the proportion equation
   123,892.74 : 170,955.36 = 72,900 : x
2. Step 2: Convert to fraction form
   123,892.74/170,955.36 = 72,900/x
3. Step 3: Cross multiply
   123,892.74x = 170,955.36 × 72,900
4. Step 4: Simplify right side
   123,892.74x = 12,462,645,744.00
5. Step 5: Solve for x
   x = 12,462,645,744.00/123,892.74
6. Step 6: Final answer
   x = 100,592.22