Finding the Fourth Proportional to 123,795.47, 170,838.46 and 72,810.35

Step by Step Solution

1. Step 1: Write the proportion equation
   123,795.47 : 170,838.46 = 72,810.35 : x
2. Step 2: Convert to fraction form
   123,795.47/170,838.46 = 72,810.35/x
3. Step 3: Cross multiply
   123,795.47x = 170,838.46 × 72,810.35
4. Step 4: Simplify right side
   123,795.47x = 12,438,808,066.06
5. Step 5: Solve for x
   x = 12,438,808,066.06/123,795.47
6. Step 6: Final answer
   x = 100,478.70