Finding the Fourth Proportional to 123,526.02, 170,403.30 and 78,127.55

Step by Step Solution

1. Step 1: Write the proportion equation
   123,526.02 : 170,403.30 = 78,127.55 : x
2. Step 2: Convert to fraction form
   123,526.02/170,403.30 = 78,127.55/x
3. Step 3: Cross multiply
   123,526.02x = 170,403.30 × 78,127.55
4. Step 4: Simplify right side
   123,526.02x = 13,313,191,488.90
5. Step 5: Solve for x
   x = 13,313,191,488.90/123,526.02
6. Step 6: Final answer
   x = 107,776.41