Finding the Fourth Proportional to 103,112,569.35, 142,670,051.73 and 89,909,259.21

Step by Step Solution

1. Step 1: Write the proportion equation
   103,112,569.35 : 142,670,051.73 = 89,909,259.21 : x
2. Step 2: Convert to fraction form
   103,112,569.35/142,670,051.73 = 89,909,259.21/x
3. Step 3: Cross multiply
   103,112,569.35x = 142,670,051.73 × 89,909,259.21
4. Step 4: Simplify right side
   103,112,569.35x = 12,827,358,662,496,678
5. Step 5: Solve for x
   x = 12,827,358,662,496,678/103,112,569.35
6. Step 6: Final answer
   x = 124,401,503.55