Finding the Fourth Proportional to 13,077.50, 18,047.13 and 7,109.17

Step by Step Solution

1. Step 1: Write the proportion equation
   13,077.50 : 18,047.13 = 7,109.17 : x
2. Step 2: Convert to fraction form
   13,077.50/18,047.13 = 7,109.17/x
3. Step 3: Cross multiply
   13,077.50x = 18,047.13 × 7,109.17
4. Step 4: Simplify right side
   13,077.50x = 128,300,043.40
5. Step 5: Solve for x
   x = 128,300,043.40/13,077.50
6. Step 6: Final answer
   x = 9,810.75