Finding the Fourth Proportional to 249,619.50, 374,429.34 and 83,407.50

Step by Step Solution

1. Step 1: Write the proportion equation
   249,619.50 : 374,429.34 = 83,407.50 : x
2. Step 2: Convert to fraction form
   249,619.50/374,429.34 = 83,407.50/x
3. Step 3: Cross multiply
   249,619.50x = 374,429.34 × 83,407.50
4. Step 4: Simplify right side
   249,619.50x = 31,230,215,176.05
5. Step 5: Solve for x
   x = 31,230,215,176.05/249,619.50
6. Step 6: Final answer
   x = 125,111.28