Finding the Fourth Proportional to 42,518.80, 58,756.86 and 31,889.98

Step by Step Solution

1. Step 1: Write the proportion equation
   42,518.80 : 58,756.86 = 31,889.98 : x
2. Step 2: Convert to fraction form
   42,518.80/58,756.86 = 31,889.98/x
3. Step 3: Cross multiply
   42,518.80x = 58,756.86 × 31,889.98
4. Step 4: Simplify right side
   42,518.80x = 1,873,755,090.26
5. Step 5: Solve for x
   x = 1,873,755,090.26/42,518.80
6. Step 6: Final answer
   x = 44,068.86