Finding the Fourth Proportional to 371,892.06, 557,848.62 and 91,408.50

Step by Step Solution

1. Step 1: Write the proportion equation
   371,892.06 : 557,848.62 = 91,408.50 : x
2. Step 2: Convert to fraction form
   371,892.06/557,848.62 = 91,408.50/x
3. Step 3: Cross multiply
   371,892.06x = 557,848.62 × 91,408.50
4. Step 4: Simplify right side
   371,892.06x = 50,992,105,581.27
5. Step 5: Solve for x
   x = 50,992,105,581.27/371,892.06
6. Step 6: Final answer
   x = 137,115.34