Finding the Fourth Proportional to 105,389.60, 145,440.14 and 60,071.81

Step by Step Solution

1. Step 1: Write the proportion equation
   105,389.60 : 145,440.14 = 60,071.81 : x
2. Step 2: Convert to fraction form
   105,389.60/145,440.14 = 60,071.81/x
3. Step 3: Cross multiply
   105,389.60x = 145,440.14 × 60,071.81
4. Step 4: Simplify right side
   105,389.60x = 8,736,851,428.89
5. Step 5: Solve for x
   x = 8,736,851,428.89/105,389.60
6. Step 6: Final answer
   x = 82,900.51