Finding the Fourth Proportional to 91,315.86, 136,984.72 and 38,718.50

Step by Step Solution

1. Step 1: Write the proportion equation
   91,315.86 : 136,984.72 = 38,718.50 : x
2. Step 2: Convert to fraction form
   91,315.86/136,984.72 = 38,718.50/x
3. Step 3: Cross multiply
   91,315.86x = 136,984.72 × 38,718.50
4. Step 4: Simplify right side
   91,315.86x = 5,303,842,881.32
5. Step 5: Solve for x
   x = 5,303,842,881.32/91,315.86
6. Step 6: Final answer
   x = 58,082.38