Finding the Fourth Proportional to 93,443.82, 128,969.19 and 55,720.50

Step by Step Solution

1. Step 1: Write the proportion equation
   93,443.82 : 128,969.19 = 55,720.50 : x
2. Step 2: Convert to fraction form
   93,443.82/128,969.19 = 55,720.50/x
3. Step 3: Cross multiply
   93,443.82x = 128,969.19 × 55,720.50
4. Step 4: Simplify right side
   93,443.82x = 7,186,227,751.40
5. Step 5: Solve for x
   x = 7,186,227,751.40/93,443.82
6. Step 6: Final answer
   x = 76,904.26