Finding the Fourth Proportional to 91,840.08, 137,628.56 and 52,315.58

Step by Step Solution

1. Step 1: Write the proportion equation
   91,840.08 : 137,628.56 = 52,315.58 : x
2. Step 2: Convert to fraction form
   91,840.08/137,628.56 = 52,315.58/x
3. Step 3: Cross multiply
   91,840.08x = 137,628.56 × 52,315.58
4. Step 4: Simplify right side
   91,840.08x = 7,200,117,940.96
5. Step 5: Solve for x
   x = 7,200,117,940.96/91,840.08
6. Step 6: Final answer
   x = 78,398.43