Finding the Fourth Proportional to 81,111,729.38, 121,222,278.34 and 59,298,030.05

Step by Step Solution

1. Step 1: Write the proportion equation
   81,111,729.38 : 121,222,278.34 = 59,298,030.05 : x
2. Step 2: Convert to fraction form
   81,111,729.38/121,222,278.34 = 59,298,030.05/x
3. Step 3: Cross multiply
   81,111,729.38x = 121,222,278.34 × 59,298,030.05
4. Step 4: Simplify right side
   81,111,729.38x = 7,188,242,302,980,428
5. Step 5: Solve for x
   x = 7,188,242,302,980,428/81,111,729.38
6. Step 6: Final answer
   x = 88,621,489.87