Finding the Fourth Proportional to 101,800.72, 152,715.64 and 31,687.12

Step by Step Solution

1. Step 1: Write the proportion equation
   101,800.72 : 152,715.64 = 31,687.12 : x
2. Step 2: Convert to fraction form
   101,800.72/152,715.64 = 31,687.12/x
3. Step 3: Cross multiply
   101,800.72x = 152,715.64 × 31,687.12
4. Step 4: Simplify right side
   101,800.72x = 4,839,118,810.56
5. Step 5: Solve for x
   x = 4,839,118,810.56/101,800.72
6. Step 6: Final answer
   x = 47,535.21