Finding the Fourth Proportional to 121,100.40, 181,592.28 and 42,212.88

Step by Step Solution

1. Step 1: Write the proportion equation
   121,100.40 : 181,592.28 = 42,212.88 : x
2. Step 2: Convert to fraction form
   121,100.40/181,592.28 = 42,212.88/x
3. Step 3: Cross multiply
   121,100.40x = 181,592.28 × 42,212.88
4. Step 4: Simplify right side
   121,100.40x = 7,665,533,124.57
5. Step 5: Solve for x
   x = 7,665,533,124.57/121,100.40
6. Step 6: Final answer
   x = 63,298.99