Finding the Fourth Proportional to 93,153.58, 128,568.71 and 54,910.86

Step by Step Solution

1. Step 1: Write the proportion equation
   93,153.58 : 128,568.71 = 54,910.86 : x
2. Step 2: Convert to fraction form
   93,153.58/128,568.71 = 54,910.86/x
3. Step 3: Cross multiply
   93,153.58x = 128,568.71 × 54,910.86
4. Step 4: Simplify right side
   93,153.58x = 7,059,818,435.19
5. Step 5: Solve for x
   x = 7,059,818,435.19/93,153.58
6. Step 6: Final answer
   x = 75,786.87