Finding the Fourth Proportional to 93,047.34, 128,438.73 and 55,321.50

Step by Step Solution

1. Step 1: Write the proportion equation
   93,047.34 : 128,438.73 = 55,321.50 : x
2. Step 2: Convert to fraction form
   93,047.34/128,438.73 = 55,321.50/x
3. Step 3: Cross multiply
   93,047.34x = 128,438.73 × 55,321.50
4. Step 4: Simplify right side
   93,047.34x = 7,105,423,201.70
5. Step 5: Solve for x
   x = 7,105,423,201.70/93,047.34
6. Step 6: Final answer
   x = 76,363.53