Finding the Fourth Proportional to 123,547.07, 184,970.39 and 81,300.11

Step by Step Solution

1. Step 1: Write the proportion equation
   123,547.07 : 184,970.39 = 81,300.11 : x
2. Step 2: Convert to fraction form
   123,547.07/184,970.39 = 81,300.11/x
3. Step 3: Cross multiply
   123,547.07x = 184,970.39 × 81,300.11
4. Step 4: Simplify right side
   123,547.07x = 15,038,111,722.39
5. Step 5: Solve for x
   x = 15,038,111,722.39/123,547.07
6. Step 6: Final answer
   x = 121,719.69