Finding the Fourth Proportional to 102,644.89, 141,642.23 and 64,402.45

Step by Step Solution

1. Step 1: Write the proportion equation
   102,644.89 : 141,642.23 = 64,402.45 : x
2. Step 2: Convert to fraction form
   102,644.89/141,642.23 = 64,402.45/x
3. Step 3: Cross multiply
   102,644.89x = 141,642.23 × 64,402.45
4. Step 4: Simplify right side
   102,644.89x = 9,122,105,959.35
5. Step 5: Solve for x
   x = 9,122,105,959.35/102,644.89
6. Step 6: Final answer
   x = 88,870.53