Finding the Fourth Proportional to 78,501.61, 108,333.05 and 42,691.61

Step by Step Solution

1. Step 1: Write the proportion equation
   78,501.61 : 108,333.05 = 42,691.61 : x
2. Step 2: Convert to fraction form
   78,501.61/108,333.05 = 42,691.61/x
3. Step 3: Cross multiply
   78,501.61x = 108,333.05 × 42,691.61
4. Step 4: Simplify right side
   78,501.61x = 4,624,911,768.71
5. Step 5: Solve for x
   x = 4,624,911,768.71/78,501.61
6. Step 6: Final answer
   x = 58,914.87