Finding the Fourth Proportional to 78,700.01, 108,606.10 and 42,890.05

Step by Step Solution

1. Step 1: Write the proportion equation
   78,700.01 : 108,606.10 = 42,890.05 : x
2. Step 2: Convert to fraction form
   78,700.01/108,606.10 = 42,890.05/x
3. Step 3: Cross multiply
   78,700.01x = 108,606.10 × 42,890.05
4. Step 4: Simplify right side
   78,700.01x = 4,658,120,680.56
5. Step 5: Solve for x
   x = 4,658,120,680.56/78,700.01
6. Step 6: Final answer
   x = 59,188.31