Finding the Fourth Proportional to 31,395.34, 43,312.98 and 20,061.91

Step by Step Solution

1. Step 1: Write the proportion equation
   31,395.34 : 43,312.98 = 20,061.91 : x
2. Step 2: Convert to fraction form
   31,395.34/43,312.98 = 20,061.91/x
3. Step 3: Cross multiply
   31,395.34x = 43,312.98 × 20,061.91
4. Step 4: Simplify right side
   31,395.34x = 868,941,106.59
5. Step 5: Solve for x
   x = 868,941,106.59/31,395.34
6. Step 6: Final answer
   x = 27,677.39