Finding the Fourth Proportional to 77,024.10, 115,478.55 and 42,003.30

Step by Step Solution

1. Step 1: Write the proportion equation
   77,024.10 : 115,478.55 = 42,003.30 : x
2. Step 2: Convert to fraction form
   77,024.10/115,478.55 = 42,003.30/x
3. Step 3: Cross multiply
   77,024.10x = 115,478.55 × 42,003.30
4. Step 4: Simplify right side
   77,024.10x = 4,850,480,179.22
5. Step 5: Solve for x
   x = 4,850,480,179.22/77,024.10
6. Step 6: Final answer
   x = 62,973.54