Finding the Fourth Proportional to 291,423.72, 437,097.31 and 91,745.15

Step by Step Solution

1. Step 1: Write the proportion equation
   291,423.72 : 437,097.31 = 91,745.15 : x
2. Step 2: Convert to fraction form
   291,423.72/437,097.31 = 91,745.15/x
3. Step 3: Cross multiply
   291,423.72x = 437,097.31 × 91,745.15
4. Step 4: Simplify right side
   291,423.72x = 40,101,557,811.82
5. Step 5: Solve for x
   x = 40,101,557,811.82/291,423.72
6. Step 6: Final answer
   x = 137,605.68