Finding the Fourth Proportional to 249,887.76, 374,831.18 and 81,407.89

Step by Step Solution

1. Step 1: Write the proportion equation
   249,887.76 : 374,831.18 = 81,407.89 : x
2. Step 2: Convert to fraction form
   249,887.76/374,831.18 = 81,407.89/x
3. Step 3: Cross multiply
   249,887.76x = 374,831.18 × 81,407.89
4. Step 4: Simplify right side
   249,887.76x = 30,514,215,470.01
5. Step 5: Solve for x
   x = 30,514,215,470.01/249,887.76
6. Step 6: Final answer
   x = 122,111.69