Finding the Fourth Proportional to 72,156.40, 99,511.35 and 45,301.42

Step by Step Solution

1. Step 1: Write the proportion equation
   72,156.40 : 99,511.35 = 45,301.42 : x
2. Step 2: Convert to fraction form
   72,156.40/99,511.35 = 45,301.42/x
3. Step 3: Cross multiply
   72,156.40x = 99,511.35 × 45,301.42
4. Step 4: Simplify right side
   72,156.40x = 4,508,005,461.12
5. Step 5: Solve for x
   x = 4,508,005,461.12/72,156.40
6. Step 6: Final answer
   x = 62,475.48