Finding the Fourth Proportional to 103,189.82, 142,341.47 and 64,888.63

Step by Step Solution

1. Step 1: Write the proportion equation
   103,189.82 : 142,341.47 = 64,888.63 : x
2. Step 2: Convert to fraction form
   103,189.82/142,341.47 = 64,888.63/x
3. Step 3: Cross multiply
   103,189.82x = 142,341.47 × 64,888.63
4. Step 4: Simplify right side
   103,189.82x = 9,236,342,656.04
5. Step 5: Solve for x
   x = 9,236,342,656.04/103,189.82
6. Step 6: Final answer
   x = 89,508.28