Finding the Fourth Proportional to 100,992.18, 139,368.42 and 55,051.71

Step by Step Solution

1. Step 1: Write the proportion equation
   100,992.18 : 139,368.42 = 55,051.71 : x
2. Step 2: Convert to fraction form
   100,992.18/139,368.42 = 55,051.71/x
3. Step 3: Cross multiply
   100,992.18x = 139,368.42 × 55,051.71
4. Step 4: Simplify right side
   100,992.18x = 7,672,469,841.00
5. Step 5: Solve for x
   x = 7,672,469,841.00/100,992.18
6. Step 6: Final answer
   x = 75,970.93