Finding the Fourth Proportional to 61,054.43, 91,439.48 and 59,372.78

Step by Step Solution

1. Step 1: Write the proportion equation
   61,054.43 : 91,439.48 = 59,372.78 : x
2. Step 2: Convert to fraction form
   61,054.43/91,439.48 = 59,372.78/x
3. Step 3: Cross multiply
   61,054.43x = 91,439.48 × 59,372.78
4. Step 4: Simplify right side
   61,054.43x = 5,429,015,375.29
5. Step 5: Solve for x
   x = 5,429,015,375.29/61,054.43
6. Step 6: Final answer
   x = 88,920.92