Finding the Fourth Proportional to 91,475.80, 137,300.10 and 56,483.80

Step by Step Solution

1. Step 1: Write the proportion equation
   91,475.80 : 137,300.10 = 56,483.80 : x
2. Step 2: Convert to fraction form
   91,475.80/137,300.10 = 56,483.80/x
3. Step 3: Cross multiply
   91,475.80x = 137,300.10 × 56,483.80
4. Step 4: Simplify right side
   91,475.80x = 7,755,231,388.38
5. Step 5: Solve for x
   x = 7,755,231,388.38/91,475.80
6. Step 6: Final answer
   x = 84,779.05