Finding the Fourth Proportional to 123,386.10, 185,079.15 and 76,730.10

Step by Step Solution

1. Step 1: Write the proportion equation
   123,386.10 : 185,079.15 = 76,730.10 : x
2. Step 2: Convert to fraction form
   123,386.10/185,079.15 = 76,730.10/x
3. Step 3: Cross multiply
   123,386.10x = 185,079.15 × 76,730.10
4. Step 4: Simplify right side
   123,386.10x = 14,201,141,687.42
5. Step 5: Solve for x
   x = 14,201,141,687.42/123,386.10
6. Step 6: Final answer
   x = 115,095.15