Finding the Fourth Proportional to 127,089.74, 190,501.58 and 42,820.78

Step by Step Solution

1. Step 1: Write the proportion equation
   127,089.74 : 190,501.58 = 42,820.78 : x
2. Step 2: Convert to fraction form
   127,089.74/190,501.58 = 42,820.78/x
3. Step 3: Cross multiply
   127,089.74x = 190,501.58 × 42,820.78
4. Step 4: Simplify right side
   127,089.74x = 8,157,426,246.83
5. Step 5: Solve for x
   x = 8,157,426,246.83/127,089.74
6. Step 6: Final answer
   x = 64,186.35