Finding the Fourth Proportional to 123,065.22, 169,886.70 and 72,070.86

Step by Step Solution

1. Step 1: Write the proportion equation
   123,065.22 : 169,886.70 = 72,070.86 : x
2. Step 2: Convert to fraction form
   123,065.22/169,886.70 = 72,070.86/x
3. Step 3: Cross multiply
   123,065.22x = 169,886.70 × 72,070.86
4. Step 4: Simplify right side
   123,065.22x = 12,243,880,571.56
5. Step 5: Solve for x
   x = 12,243,880,571.56/123,065.22
6. Step 6: Final answer
   x = 99,490.99