Finding the Fourth Proportional to 99,831.84, 137,765.76 and 54,510.72

Step by Step Solution

1. Step 1: Write the proportion equation
   99,831.84 : 137,765.76 = 54,510.72 : x
2. Step 2: Convert to fraction form
   99,831.84/137,765.76 = 54,510.72/x
3. Step 3: Cross multiply
   99,831.84x = 137,765.76 × 54,510.72
4. Step 4: Simplify right side
   99,831.84x = 7,509,710,768.95
5. Step 5: Solve for x
   x = 7,509,710,768.95/99,831.84
6. Step 6: Final answer
   x = 75,223.60