Finding the Fourth Proportional to 137,196.72, 205,654.76 and 92,828.16

Step by Step Solution

1. Step 1: Write the proportion equation
   137,196.72 : 205,654.76 = 92,828.16 : x
2. Step 2: Convert to fraction form
   137,196.72/205,654.76 = 92,828.16/x
3. Step 3: Cross multiply
   137,196.72x = 205,654.76 × 92,828.16
4. Step 4: Simplify right side
   137,196.72x = 19,090,552,966.04
5. Step 5: Solve for x
   x = 19,090,552,966.04/137,196.72
6. Step 6: Final answer
   x = 139,147.30