Finding the Fourth Proportional to 105,136.06, 145,082.69 and 59,809.78

Step by Step Solution

1. Step 1: Write the proportion equation
   105,136.06 : 145,082.69 = 59,809.78 : x
2. Step 2: Convert to fraction form
   105,136.06/145,082.69 = 59,809.78/x
3. Step 3: Cross multiply
   105,136.06x = 145,082.69 × 59,809.78
4. Step 4: Simplify right side
   105,136.06x = 8,677,363,397.64
5. Step 5: Solve for x
   x = 8,677,363,397.64/105,136.06
6. Step 6: Final answer
   x = 82,534.61