Finding the Fourth Proportional to 66,012.40, 91,088.72 and 37,719.92

Step by Step Solution

1. Step 1: Write the proportion equation
   66,012.40 : 91,088.72 = 37,719.92 : x
2. Step 2: Convert to fraction form
   66,012.40/91,088.72 = 37,719.92/x
3. Step 3: Cross multiply
   66,012.40x = 91,088.72 × 37,719.92
4. Step 4: Simplify right side
   66,012.40x = 3,435,859,231.30
5. Step 5: Solve for x
   x = 3,435,859,231.30/66,012.40
6. Step 6: Final answer
   x = 52,048.69