Finding the Fourth Proportional to 123,300.71, 170,136.74 and 74,877.45

Step by Step Solution

1. Step 1: Write the proportion equation
   123,300.71 : 170,136.74 = 74,877.45 : x
2. Step 2: Convert to fraction form
   123,300.71/170,136.74 = 74,877.45/x
3. Step 3: Cross multiply
   123,300.71x = 170,136.74 × 74,877.45
4. Step 4: Simplify right side
   123,300.71x = 12,739,404,868.13
5. Step 5: Solve for x
   x = 12,739,404,868.13/123,300.71
6. Step 6: Final answer
   x = 103,319.81