Finding the Fourth Proportional to 76,139.08, 105,068.82 and 42,602.92

Step by Step Solution

1. Step 1: Write the proportion equation
   76,139.08 : 105,068.82 = 42,602.92 : x
2. Step 2: Convert to fraction form
   76,139.08/105,068.82 = 42,602.92/x
3. Step 3: Cross multiply
   76,139.08x = 105,068.82 × 42,602.92
4. Step 4: Simplify right side
   76,139.08x = 4,476,238,532.95
5. Step 5: Solve for x
   x = 4,476,238,532.95/76,139.08
6. Step 6: Final answer
   x = 58,790.29