Finding the Fourth Proportional to 123,404.79, 170,212.01 and 75,677.16

Step by Step Solution

1. Step 1: Write the proportion equation
   123,404.79 : 170,212.01 = 75,677.16 : x
2. Step 2: Convert to fraction form
   123,404.79/170,212.01 = 75,677.16/x
3. Step 3: Cross multiply
   123,404.79x = 170,212.01 × 75,677.16
4. Step 4: Simplify right side
   123,404.79x = 12,881,161,136.31
5. Step 5: Solve for x
   x = 12,881,161,136.31/123,404.79
6. Step 6: Final answer
   x = 104,381.37