Finding the Fourth Proportional to 99,483.48, 137,263.56 and 56,453.40

Step by Step Solution

1. Step 1: Write the proportion equation
   99,483.48 : 137,263.56 = 56,453.40 : x
2. Step 2: Convert to fraction form
   99,483.48/137,263.56 = 56,453.40/x
3. Step 3: Cross multiply
   99,483.48x = 137,263.56 × 56,453.40
4. Step 4: Simplify right side
   99,483.48x = 7,748,994,658.10
5. Step 5: Solve for x
   x = 7,748,994,658.10/99,483.48
6. Step 6: Final answer
   x = 77,892.28