Finding the Fourth Proportional to 66,419.34, 91,660.40 and 37,738.05

Step by Step Solution

1. Step 1: Write the proportion equation
   66,419.34 : 91,660.40 = 37,738.05 : x
2. Step 2: Convert to fraction form
   66,419.34/91,660.40 = 37,738.05/x
3. Step 3: Cross multiply
   66,419.34x = 91,660.40 × 37,738.05
4. Step 4: Simplify right side
   66,419.34x = 3,459,084,569.53
5. Step 5: Solve for x
   x = 3,459,084,569.53/66,419.34
6. Step 6: Final answer
   x = 52,079.48