Finding the Fourth Proportional to 91,388.50, 137,085.10 and 43,345.88

Step by Step Solution

1. Step 1: Write the proportion equation
   91,388.50 : 137,085.10 = 43,345.88 : x
2. Step 2: Convert to fraction form
   91,388.50/137,085.10 = 43,345.88/x
3. Step 3: Cross multiply
   91,388.50x = 137,085.10 × 43,345.88
4. Step 4: Simplify right side
   91,388.50x = 5,942,074,294.39
5. Step 5: Solve for x
   x = 5,942,074,294.39/91,388.50
6. Step 6: Final answer
   x = 65,019.94