Finding the Fourth Proportional to 72,018.61, 99,311.94 and 47,811.06

Step by Step Solution

1. Step 1: Write the proportion equation
   72,018.61 : 99,311.94 = 47,811.06 : x
2. Step 2: Convert to fraction form
   72,018.61/99,311.94 = 47,811.06/x
3. Step 3: Cross multiply
   72,018.61x = 99,311.94 × 47,811.06
4. Step 4: Simplify right side
   72,018.61x = 4,748,209,122.06
5. Step 5: Solve for x
   x = 4,748,209,122.06/72,018.61
6. Step 6: Final answer
   x = 65,930.31