Finding the Fourth Proportional to 81,870.24, 112,994.50 and 51,672.02

Step by Step Solution

1. Step 1: Write the proportion equation
   81,870.24 : 112,994.50 = 51,672.02 : x
2. Step 2: Convert to fraction form
   81,870.24/112,994.50 = 51,672.02/x
3. Step 3: Cross multiply
   81,870.24x = 112,994.50 × 51,672.02
4. Step 4: Simplify right side
   81,870.24x = 5,838,654,063.89
5. Step 5: Solve for x
   x = 5,838,654,063.89/81,870.24
6. Step 6: Final answer
   x = 71,315.95