Finding the Fourth Proportional to 72,470.58, 100,011.93 and 42,250.78

Step by Step Solution

1. Step 1: Write the proportion equation
   72,470.58 : 100,011.93 = 42,250.78 : x
2. Step 2: Convert to fraction form
   72,470.58/100,011.93 = 42,250.78/x
3. Step 3: Cross multiply
   72,470.58x = 100,011.93 × 42,250.78
4. Step 4: Simplify right side
   72,470.58x = 4,225,582,051.81
5. Step 5: Solve for x
   x = 4,225,582,051.81/72,470.58
6. Step 6: Final answer
   x = 58,307.55