Finding the Fourth Proportional to 91,031.79, 136,367.46 and 42,934.53

Step by Step Solution

1. Step 1: Write the proportion equation
   91,031.79 : 136,367.46 = 42,934.53 : x
2. Step 2: Convert to fraction form
   91,031.79/136,367.46 = 42,934.53/x
3. Step 3: Cross multiply
   91,031.79x = 136,367.46 × 42,934.53
4. Step 4: Simplify right side
   91,031.79x = 5,854,872,802.39
5. Step 5: Solve for x
   x = 5,854,872,802.39/91,031.79
6. Step 6: Final answer
   x = 64,316.79