Finding the Fourth Proportional to 91,838.10, 137,494.35 and 56,540.10

Step by Step Solution

1. Step 1: Write the proportion equation
   91,838.10 : 137,494.35 = 56,540.10 : x
2. Step 2: Convert to fraction form
   91,838.10/137,494.35 = 56,540.10/x
3. Step 3: Cross multiply
   91,838.10x = 137,494.35 × 56,540.10
4. Step 4: Simplify right side
   91,838.10x = 7,773,944,298.44
5. Step 5: Solve for x
   x = 7,773,944,298.44/91,838.10
6. Step 6: Final answer
   x = 84,648.36