Finding the Fourth Proportional to 91,290.50, 136,953.04 and 42,042.50

Step by Step Solution

1. Step 1: Write the proportion equation
   91,290.50 : 136,953.04 = 42,042.50 : x
2. Step 2: Convert to fraction form
   91,290.50/136,953.04 = 42,042.50/x
3. Step 3: Cross multiply
   91,290.50x = 136,953.04 × 42,042.50
4. Step 4: Simplify right side
   91,290.50x = 5,757,848,184.20
5. Step 5: Solve for x
   x = 5,757,848,184.20/91,290.50
6. Step 6: Final answer
   x = 63,071.71