Finding the Fourth Proportional to 77,111.25, 106,440.33 and 52,992.09

Step by Step Solution

1. Step 1: Write the proportion equation
   77,111.25 : 106,440.33 = 52,992.09 : x
2. Step 2: Convert to fraction form
   77,111.25/106,440.33 = 52,992.09/x
3. Step 3: Cross multiply
   77,111.25x = 106,440.33 × 52,992.09
4. Step 4: Simplify right side
   77,111.25x = 5,640,495,546.99
5. Step 5: Solve for x
   x = 5,640,495,546.99/77,111.25
6. Step 6: Final answer
   x = 73,147.51