Finding the Fourth Proportional to 102,897.12, 142,007.76 and 64,662.96

Step by Step Solution

1. Step 1: Write the proportion equation
   102,897.12 : 142,007.76 = 64,662.96 : x
2. Step 2: Convert to fraction form
   102,897.12/142,007.76 = 64,662.96/x
3. Step 3: Cross multiply
   102,897.12x = 142,007.76 × 64,662.96
4. Step 4: Simplify right side
   102,897.12x = 9,182,642,104.57
5. Step 5: Solve for x
   x = 9,182,642,104.57/102,897.12
6. Step 6: Final answer
   x = 89,241.00