Finding the Fourth Proportional to 105,060.51, 157,636.98 and 55,128.87

Step by Step Solution

1. Step 1: Write the proportion equation
   105,060.51 : 157,636.98 = 55,128.87 : x
2. Step 2: Convert to fraction form
   105,060.51/157,636.98 = 55,128.87/x
3. Step 3: Cross multiply
   105,060.51x = 157,636.98 × 55,128.87
4. Step 4: Simplify right side
   105,060.51x = 8,690,348,577.61
5. Step 5: Solve for x
   x = 8,690,348,577.61/105,060.51
6. Step 6: Final answer
   x = 82,717.56