Finding the Fourth Proportional to 42,011.35, 58,031.10 and 31,131.63

Step by Step Solution

1. Step 1: Write the proportion equation
   42,011.35 : 58,031.10 = 31,131.63 : x
2. Step 2: Convert to fraction form
   42,011.35/58,031.10 = 31,131.63/x
3. Step 3: Cross multiply
   42,011.35x = 58,031.10 × 31,131.63
4. Step 4: Simplify right side
   42,011.35x = 1,806,602,733.69
5. Step 5: Solve for x
   x = 1,806,602,733.69/42,011.35
6. Step 6: Final answer
   x = 43,002.73