Finding the Fourth Proportional to 64,978.39, 97,506.47 and 59,690.71

Step by Step Solution

1. Step 1: Write the proportion equation
   64,978.39 : 97,506.47 = 59,690.71 : x
2. Step 2: Convert to fraction form
   64,978.39/97,506.47 = 59,690.71/x
3. Step 3: Cross multiply
   64,978.39x = 97,506.47 × 59,690.71
4. Step 4: Simplify right side
   64,978.39x = 5,820,230,423.89
5. Step 5: Solve for x
   x = 5,820,230,423.89/64,978.39
6. Step 6: Final answer
   x = 89,571.79