Finding the Fourth Proportional to 61,483.56, 91,715.90 and 59,670.78

Step by Step Solution

1. Step 1: Write the proportion equation
   61,483.56 : 91,715.90 = 59,670.78 : x
2. Step 2: Convert to fraction form
   61,483.56/91,715.90 = 59,670.78/x
3. Step 3: Cross multiply
   61,483.56x = 91,715.90 × 59,670.78
4. Step 4: Simplify right side
   61,483.56x = 5,472,759,291.40
5. Step 5: Solve for x
   x = 5,472,759,291.40/61,483.56
6. Step 6: Final answer
   x = 89,011.75