Finding the Fourth Proportional to 76,239.61, 105,211.62 and 42,248.76

Step by Step Solution

1. Step 1: Write the proportion equation
   76,239.61 : 105,211.62 = 42,248.76 : x
2. Step 2: Convert to fraction form
   76,239.61/105,211.62 = 42,248.76/x
3. Step 3: Cross multiply
   76,239.61x = 105,211.62 × 42,248.76
4. Step 4: Simplify right side
   76,239.61x = 4,445,060,482.59
5. Step 5: Solve for x
   x = 4,445,060,482.59/76,239.61
6. Step 6: Final answer
   x = 58,303.82