Finding the Fourth Proportional to 93,144.50, 128,670.12 and 83,069.72

Step by Step Solution

1. Step 1: Write the proportion equation
   93,144.50 : 128,670.12 = 83,069.72 : x
2. Step 2: Convert to fraction form
   93,144.50/128,670.12 = 83,069.72/x
3. Step 3: Cross multiply
   93,144.50x = 128,670.12 × 83,069.72
4. Step 4: Simplify right side
   93,144.50x = 10,688,590,840.77
5. Step 5: Solve for x
   x = 10,688,590,840.77/93,144.50
6. Step 6: Final answer
   x = 114,752.79