Finding the Fourth Proportional to 105,092.52, 144,985.98 and 64,736.28

Step by Step Solution

1. Step 1: Write the proportion equation
   105,092.52 : 144,985.98 = 64,736.28 : x
2. Step 2: Convert to fraction form
   105,092.52/144,985.98 = 64,736.28/x
3. Step 3: Cross multiply
   105,092.52x = 144,985.98 × 64,736.28
4. Step 4: Simplify right side
   105,092.52x = 9,385,852,997.35
5. Step 5: Solve for x
   x = 9,385,852,997.35/105,092.52
6. Step 6: Final answer
   x = 89,310.38