Finding the Fourth Proportional to 78,670, 108,565.56 and 45,139.12

Step by Step Solution

1. Step 1: Write the proportion equation
   78,670 : 108,565.56 = 45,139.12 : x
2. Step 2: Convert to fraction form
   78,670/108,565.56 = 45,139.12/x
3. Step 3: Cross multiply
   78,670x = 108,565.56 × 45,139.12
4. Step 4: Simplify right side
   78,670x = 4,900,553,840.71
5. Step 5: Solve for x
   x = 4,900,553,840.71/78,670
6. Step 6: Final answer
   x = 62,292.54