Finding the Fourth Proportional to 112,538.11, 168,807.33 and 45,978.30

Step by Step Solution

1. Step 1: Write the proportion equation
   112,538.11 : 168,807.33 = 45,978.30 : x
2. Step 2: Convert to fraction form
   112,538.11/168,807.33 = 45,978.30/x
3. Step 3: Cross multiply
   112,538.11x = 168,807.33 × 45,978.30
4. Step 4: Simplify right side
   112,538.11x = 7,761,472,987.01
5. Step 5: Solve for x
   x = 7,761,472,987.01/112,538.11
6. Step 6: Final answer
   x = 68,967.51