Finding the Fourth Proportional to 102,468.88, 153,713.56 and 31,390.69

Step by Step Solution

1. Step 1: Write the proportion equation
   102,468.88 : 153,713.56 = 31,390.69 : x
2. Step 2: Convert to fraction form
   102,468.88/153,713.56 = 31,390.69/x
3. Step 3: Cross multiply
   102,468.88x = 153,713.56 × 31,390.69
4. Step 4: Simplify right side
   102,468.88x = 4,825,174,710.76
5. Step 5: Solve for x
   x = 4,825,174,710.76/102,468.88
6. Step 6: Final answer
   x = 47,089.17