Finding the Fourth Proportional to 13,656.51, 18,845.96 and 7,690.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,656.51 : 18,845.96 = 7,690.10 : x
2. Step 2: Convert to fraction form
   13,656.51/18,845.96 = 7,690.10/x
3. Step 3: Cross multiply
   13,656.51x = 18,845.96 × 7,690.10
4. Step 4: Simplify right side
   13,656.51x = 144,927,184.32
5. Step 5: Solve for x
   x = 144,927,184.32/13,656.51
6. Step 6: Final answer
   x = 10,612.31