Finding the Fourth Proportional to 76,131.63, 105,060.19 and 42,140.15

Step by Step Solution

1. Step 1: Write the proportion equation
   76,131.63 : 105,060.19 = 42,140.15 : x
2. Step 2: Convert to fraction form
   76,131.63/105,060.19 = 42,140.15/x
3. Step 3: Cross multiply
   76,131.63x = 105,060.19 × 42,140.15
4. Step 4: Simplify right side
   76,131.63x = 4,427,251,429.63
5. Step 5: Solve for x
   x = 4,427,251,429.63/76,131.63
6. Step 6: Final answer
   x = 58,152.59