Finding the Fourth Proportional to 101,400.72, 152,139.96 and 42,220.50

Step by Step Solution

1. Step 1: Write the proportion equation
   101,400.72 : 152,139.96 = 42,220.50 : x
2. Step 2: Convert to fraction form
   101,400.72/152,139.96 = 42,220.50/x
3. Step 3: Cross multiply
   101,400.72x = 152,139.96 × 42,220.50
4. Step 4: Simplify right side
   101,400.72x = 6,423,425,181.18
5. Step 5: Solve for x
   x = 6,423,425,181.18/101,400.72
6. Step 6: Final answer
   x = 63,346.94