Finding the Fourth Proportional to 123,795.55, 170,838.56 and 72,810.43

Step by Step Solution

1. Step 1: Write the proportion equation
   123,795.55 : 170,838.56 = 72,810.43 : x
2. Step 2: Convert to fraction form
   123,795.55/170,838.56 = 72,810.43/x
3. Step 3: Cross multiply
   123,795.55x = 170,838.56 × 72,810.43
4. Step 4: Simplify right side
   123,795.55x = 12,438,828,223.03
5. Step 5: Solve for x
   x = 12,438,828,223.03/123,795.55
6. Step 6: Final answer
   x = 100,478.80