Finding the Fourth Proportional to 58,031.35, 79,561.72 and 56,981.59

Step by Step Solution

1. Step 1: Write the proportion equation
   58,031.35 : 79,561.72 = 56,981.59 : x
2. Step 2: Convert to fraction form
   58,031.35/79,561.72 = 56,981.59/x
3. Step 3: Cross multiply
   58,031.35x = 79,561.72 × 56,981.59
4. Step 4: Simplify right side
   58,031.35x = 4,533,553,308.73
5. Step 5: Solve for x
   x = 4,533,553,308.73/58,031.35
6. Step 6: Final answer
   x = 78,122.49