Finding the Fourth Proportional to 66,786.03, 91,978.88 and 51,622.83

Step by Step Solution

1. Step 1: Write the proportion equation
   66,786.03 : 91,978.88 = 51,622.83 : x
2. Step 2: Convert to fraction form
   66,786.03/91,978.88 = 51,622.83/x
3. Step 3: Cross multiply
   66,786.03x = 91,978.88 × 51,622.83
4. Step 4: Simplify right side
   66,786.03x = 4,748,209,827.72
5. Step 5: Solve for x
   x = 4,748,209,827.72/66,786.03
6. Step 6: Final answer
   x = 71,095.85