Finding the Fourth Proportional to 91,061.43, 136,591.82 and 42,369.90

Step by Step Solution

1. Step 1: Write the proportion equation
   91,061.43 : 136,591.82 = 42,369.90 : x
2. Step 2: Convert to fraction form
   91,061.43/136,591.82 = 42,369.90/x
3. Step 3: Cross multiply
   91,061.43x = 136,591.82 × 42,369.90
4. Step 4: Simplify right side
   91,061.43x = 5,787,381,071.26
5. Step 5: Solve for x
   x = 5,787,381,071.26/91,061.43
6. Step 6: Final answer
   x = 63,554.69