Finding the Fourth Proportional to 93,411.47, 128,870.79 and 57,539.27

Step by Step Solution

1. Step 1: Write the proportion equation
   93,411.47 : 128,870.79 = 57,539.27 : x
2. Step 2: Convert to fraction form
   93,411.47/128,870.79 = 57,539.27/x
3. Step 3: Cross multiply
   93,411.47x = 128,870.79 × 57,539.27
4. Step 4: Simplify right side
   93,411.47x = 7,415,131,180.92
5. Step 5: Solve for x
   x = 7,415,131,180.92/93,411.47
6. Step 6: Final answer
   x = 79,381.38